diff --git a/src/xtd.core/CMakeLists.txt b/src/xtd.core/CMakeLists.txt
index d6c162db4620..1479e8b5eac4 100644
--- a/src/xtd.core/CMakeLists.txt
+++ b/src/xtd.core/CMakeLists.txt
@@ -522,7 +522,31 @@ add_sources(
   include/xtd/diagnostics/trace_source
   include/xtd/diagnostics/trace_switch.h
   include/xtd/diagnostics/trace_switch
+  include/xtd/internal/__as_char.h
+  include/xtd/internal/__as_bool.h
+  include/xtd/internal/__as_wchar.h
+  include/xtd/internal/__as_char8.h
+  include/xtd/internal/__as_char16.h
+  include/xtd/internal/__as_char32.h
+  include/xtd/internal/__as_double.h
+  include/xtd/internal/__as_float.h
+  include/xtd/internal/__as_byte.h
+  include/xtd/internal/__as_int16.h
   include/xtd/internal/__as_enum.h
+  include/xtd/internal/__as_enum
+  include/xtd/internal/__as_uint16.h
+  include/xtd/internal/__as_int64.h
+  include/xtd/internal/__as_uint64.h
+  include/xtd/internal/__as_slong.h
+  include/xtd/internal/__as_int32.h
+  include/xtd/internal/__as_uint32.h
+  include/xtd/internal/__as_sbyte.h
+  include/xtd/internal/__as_ustring.h
+  include/xtd/internal/__as_string.h
+  include/xtd/internal/__as_pointer.h
+  include/xtd/internal/__as_ulong.h
+  include/xtd/internal/__as_decimal.h
+  include/xtd/internal/__as_generic.h
   include/xtd/internal/__binary_formatter.h
   include/xtd/internal/__binary_formatter
   include/xtd/internal/__boolean_formatter.h
diff --git a/src/xtd.core/include/xtd/as.h b/src/xtd.core/include/xtd/as.h
index 64a37549b1fe..5bce50b099e6 100644
--- a/src/xtd.core/include/xtd/as.h
+++ b/src/xtd.core/include/xtd/as.h
@@ -2,20965 +2,44 @@
 /// @brief Contains xtd::as method.
 #pragma once
 #include "any.h"
-#include "convert.h"
-#include "convert_pointer.h"
-#include "convert_string.h"
 #include "invalid_cast_exception.h"
 #include "types.h"
+#include <memory>
 #define __XTD_CORE_INTERNAL__
 #include "internal/__as_enum.h"
+#include "internal/__as_generic.h"
+#undef __XTD_CORE_INTERNAL__
+#include "convert.h"
+#define __XTD_CORE_INTERNAL__
+#include "internal/__as_bool.h"
+#include "internal/__as_byte.h"
+#include "internal/__as_char.h"
+#include "internal/__as_char8.h"
+#include "internal/__as_char16.h"
+#include "internal/__as_char32.h"
+#include "internal/__as_decimal.h"
+#include "internal/__as_double.h"
+#include "internal/__as_float.h"
+#include "internal/__as_int16.h"
+#include "internal/__as_int32.h"
+#include "internal/__as_int64.h"
+#include "internal/__as_sbyte.h"
+#include "internal/__as_slong.h"
+#include "internal/__as_uint16.h"
+#include "internal/__as_uint32.h"
+#include "internal/__as_uint64.h"
+#include "internal/__as_ulong.h"
+#include "internal/__as_ustring.h"
+#include "internal/__as_wchar.h"
+#undef __XTD_CORE_INTERNAL__
+#include "convert_pointer.h"
+#define __XTD_CORE_INTERNAL__
+#include "internal/__as_pointer.h"
+#undef __XTD_CORE_INTERNAL__
+#include "convert_string.h"
+#define __XTD_CORE_INTERNAL__
+#include "internal/__as_string.h"
 #undef __XTD_CORE_INTERNAL__
-#include <memory>
-
-/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
-namespace xtd {
-  // ___________________________________________________________________________________________
-  //                                                                                     generic
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = 42;
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(std::any value) {
-    try {
-      return std::any_cast<new_type_t>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(bool value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(xtd::byte value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char8 value) {
-    return static_cast<new_type_t>(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u'a';
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char16 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = U'a';
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char32 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = L'a';
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(wchar value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.0l;
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(decimal value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.0;
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(double value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.0f;
-  /// int result = as<int>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(float value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(int16 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(int32 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(int64 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(slong value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(sbyte value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(uint16 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(uint32 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(uint64 value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(xtd::ulong value) {
-    return static_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// object result = as<object>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const xtd::ustring& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// object result = as<object>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(xtd::ustring& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @cond
-  template<typename new_type_t>
-  new_type_t as(const xtd::ustring& value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(xtd::byte value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(int16 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(int32 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(int64 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(slong value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(sbyte value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(uint16 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(uint32 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(uint64 value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  template<typename new_type_t>
-  new_type_t as(xtd::ulong value, xtd::byte from_base) {
-    throw invalid_cast_exception {csf_};
-  }
-  /// @endcond
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(const std::string& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(std::string& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(const std::u8string& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(std::u8string& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(const std::u16string& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(std::u16string& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(const std::u32string& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(std::u32string& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(const std::wstring& value) {
-    try {
-      return dynamic_cast<const new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @exception xtd::invalid_cast_exception value bad type
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  template<typename new_type_t>
-  new_type_t as(std::wstring& value) {
-    try {
-      return dynamic_cast<new_type_t&>(value);
-    } catch (const std::exception& e) {
-      throw invalid_cast_exception(e.what(), csf_);
-    }
-    throw std::bad_cast();
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const char* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const char8* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char8* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const char16* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char16* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const char32* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(char32* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(const wchar* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new new_type_t object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// intptr result = as<intptr>(value);
-  /// @endcode
-  template<typename new_type_t>
-  new_type_t as(wchar* value) {
-    return reinterpret_cast<new_type_t>(value);
-  }
-  
-  // ___________________________________________________________________________________________
-  //                                                                 xtd::convert specialization
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::any value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(bool value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(xtd::byte value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char8 value) {
-    return xtd::convert::to_boolean(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char16 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char32 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(wchar value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(decimal value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(double value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(float value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(int16 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(int32 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(int64 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(slong value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(sbyte value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(uint16 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(uint32 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(uint64 value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(xtd::ulong value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const xtd::ustring& value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(xtd::ustring& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const std::string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const std::u8string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::u8string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const std::u16string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::u16string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const std::u32string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::u32string& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const std::wstring& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(std::wstring& value) {
-    return xtd::convert::to_boolean(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const char* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const char8* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char8* value) {
-    return xtd::convert::to_boolean(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const char16* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char16* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const char32* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(char32* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(const wchar* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new bool object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// bool result = as<bool>(value);
-  /// @endcode
-  template<>
-  inline bool as<bool>(wchar* value) {
-    return xtd::convert::to_boolean(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::any value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(bool value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(xtd::byte value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char8 value) {
-    return xtd::convert::to_byte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char16 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char32 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(wchar value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(decimal value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(double value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(float value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(int16 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(int32 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(int64 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(slong value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(sbyte value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(uint16 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(uint32 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(uint64 value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(xtd::ulong value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a byte.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const xtd::ustring& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a byte.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(xtd::ustring& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a byte.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// xtd::byte result = as<xtd::byte>(value, 16);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_byte(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const std::string& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::string& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const std::u8string& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::u8string& value) {
-    return xtd::convert::to_byte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const std::u16string& value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::u16string& value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const std::u32string& value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::u32string& value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const std::wstring& value) {
-    return xtd::convert::to_byte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(std::wstring& value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const char* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-/// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const char8* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char8* value) {
-    return xtd::convert::to_byte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const char16* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char16* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const char32* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(char32* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(const wchar* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::byte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// xtd::byte result = as<xtd::byte>(value);
-  /// @endcode
-  template<>
-  inline xtd::byte as<xtd::byte>(wchar* value) {
-    return xtd::convert::to_byte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::any value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(bool value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(xtd::byte value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char value) {
-    return xtd::convert::to_char(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char8 value) {
-    return xtd::convert::to_char(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char16 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char32 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(wchar value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(decimal value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(double value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(float value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(int16 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(int32 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(int64 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(slong value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(sbyte value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(uint16 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(uint32 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(uint64 value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(xtd::ulong value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const xtd::ustring& value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(xtd::ustring& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const std::string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const std::u8string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::u8string& value) {
-    return xtd::convert::to_char(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const std::u16string& value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::u16string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const std::u32string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::u32string& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const std::wstring& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(std::wstring& value) {
-    return xtd::convert::to_char(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const char* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const char8* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char8* value) {
-    return xtd::convert::to_char(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const char16* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char16* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const char32* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(char32* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(const wchar* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// char result = as<char>(value);
-  /// @endcode
-  template<>
-  inline char as<char>(wchar* value) {
-    return xtd::convert::to_char(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::any value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(bool value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(xtd::byte value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char8 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char16 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char32 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(wchar value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(decimal value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(double value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(float value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(int16 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(int32 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(int64 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(slong value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(sbyte value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(uint16 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(uint32 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(uint64 value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(xtd::ulong value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const xtd::ustring& value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(xtd::ustring& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const std::string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const std::u8string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::u8string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const std::u16string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::u16string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const std::u32string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::u32string& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const std::wstring& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(std::wstring& value) {
-    return xtd::convert::to_char8(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const char* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const char8* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char8* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const char16* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char16* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const char32* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(char32* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(const wchar* value) {
-    return xtd::convert::to_char8(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char8 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// char8 result = as<char8>(value);
-  /// @endcode
-  template<>
-  inline char8 as<char8>(wchar* value) {
-    return xtd::convert::to_char8(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::any value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(bool value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(xtd::byte value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char8 value) {
-    return xtd::convert::to_char16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char16 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char32 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(wchar value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(decimal value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(double value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(float value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(int16 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(int32 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(int64 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(slong value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(sbyte value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(uint16 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(uint32 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(uint64 value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(xtd::ulong value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const xtd::ustring& value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(xtd::ustring& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const std::string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const std::u8string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::u8string& value) {
-    return xtd::convert::to_char16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const std::u16string& value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::u16string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const std::u32string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::u32string& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const std::wstring& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(std::wstring& value) {
-    return xtd::convert::to_char16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const char* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const char8* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char8* value) {
-    return xtd::convert::to_char16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const char16* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char16* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const char32* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(char32* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(const wchar* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// char16 result = as<char16>(value);
-  /// @endcode
-  template<>
-  inline char16 as<char16>(wchar* value) {
-    return xtd::convert::to_char16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::any value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(bool value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(xtd::byte value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char8 value) {
-    return xtd::convert::to_char32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char16 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char32 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(wchar value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(decimal value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(double value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(float value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(int16 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(int32 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(int64 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(slong value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(sbyte value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(uint16 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(uint32 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(uint64 value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(xtd::ulong value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const xtd::ustring& value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(xtd::ustring& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const std::string& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::string& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const std::u8string& value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::u8string& value) {
-    return xtd::convert::to_char32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const std::u16string& value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::u16string& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const std::u32string& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::u32string& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const std::wstring& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(std::wstring& value) {
-    return xtd::convert::to_char32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const char* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const char8* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char8* value) {
-    return xtd::convert::to_char32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const char16* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char16* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const char32* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(char32* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(const wchar* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new char32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// char32 result = as<char32>(value);
-  /// @endcode
-  template<>
-  inline char32 as<char32>(wchar* value) {
-    return xtd::convert::to_char32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::any value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(bool value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(xtd::byte value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char8 value) {
-    return xtd::convert::to_wchar(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char16 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char32 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(wchar value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(decimal value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(double value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(float value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(int16 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(int32 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(int64 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(slong value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(sbyte value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(uint16 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(uint32 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(uint64 value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(xtd::ulong value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const xtd::ustring& value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(xtd::ustring& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const std::string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const std::u8string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::u8string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const std::u16string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::u16string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const std::u32string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::u32string& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const std::wstring& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(std::wstring& value) {
-    return xtd::convert::to_wchar(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const char* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const char8* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char8* value) {
-    return xtd::convert::to_wchar(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const char16* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char16* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const char32* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(char32* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(const wchar* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new wchar object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// wchar result = as<wchar>(value);
-  /// @endcode
-  template<>
-  inline wchar as<wchar>(wchar* value) {
-    return xtd::convert::to_wchar(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::any value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(bool value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(xtd::byte value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char8 value) {
-    return xtd::convert::to_decimal(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char16 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char32 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(wchar value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(decimal value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(double value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(float value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(int16 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(int32 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(int64 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(slong value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(sbyte value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(uint16 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(uint32 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(uint64 value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(xtd::ulong value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const xtd::ustring& value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(xtd::ustring& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const std::string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const std::u8string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::u8string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const std::u16string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::u16string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const std::u32string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::u32string& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const std::wstring& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(std::wstring& value) {
-    return xtd::convert::to_decimal(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const char* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const char8* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char8* value) {
-    return xtd::convert::to_decimal(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const char16* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char16* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const char32* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(char32* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(const wchar* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new decimal object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// decimal result = as<decimal>(value);
-  /// @endcode
-  template<>
-  inline decimal as<decimal>(wchar* value) {
-    return xtd::convert::to_decimal(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::any value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(bool value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(xtd::byte value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char value) {
-    return xtd::convert::to_double(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char8 value) {
-    return xtd::convert::to_double(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char16 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char32 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(wchar value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(decimal value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(double value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(float value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(int16 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(int32 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(int64 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(slong value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(sbyte value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(uint16 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(uint32 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(uint64 value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(xtd::ulong value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const xtd::ustring& value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(xtd::ustring& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const std::string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const std::u8string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::u8string& value) {
-    return xtd::convert::to_double(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const std::u16string& value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::u16string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const std::u32string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::u32string& value) {
-    return xtd::convert::to_double(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const std::wstring& value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(std::wstring& value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const char* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const char8* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char8* value) {
-    return xtd::convert::to_double(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const char16* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char16* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const char32* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(char32* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(const wchar* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new double object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// double result = as<double>(value);
-  /// @endcode
-  template<>
-  inline double as<double>(wchar* value) {
-    return xtd::convert::to_double(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::any value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(bool value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(xtd::byte value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char value) {
-    return xtd::convert::to_single(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char8 value) {
-    return xtd::convert::to_single(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char16 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char32 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(wchar value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(decimal value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(double value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(float value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(int16 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(int32 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(int64 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(slong value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(sbyte value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(uint16 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(uint32 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(uint64 value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(xtd::ulong value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const xtd::ustring& value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(xtd::ustring& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const std::string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const std::u8string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::u8string& value) {
-    return xtd::convert::to_single(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const std::u16string& value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::u16string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const std::u32string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::u32string& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const std::wstring& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(std::wstring& value) {
-    return xtd::convert::to_single(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const char* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const char8* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char8* value) {
-    return xtd::convert::to_single(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const char16* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char16* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const char32* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(char32* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(const wchar* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new float object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// float result = as<float>(value);
-  /// @endcode
-  template<>
-  inline float as<float>(wchar* value) {
-    return xtd::convert::to_single(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::any value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(bool value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(xtd::byte value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char8 value) {
-    return xtd::convert::to_int16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char16 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char32 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(wchar value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(decimal value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(double value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(float value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(int16 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(int32 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(int64 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(slong value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(sbyte value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(uint16 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(uint32 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(uint64 value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(xtd::ulong value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const xtd::ustring& value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(xtd::ustring& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a int16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// int16 result = as<int16>(value, 16);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_int16(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const std::string& value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::string& value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const std::u8string& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::u8string& value) {
-    return xtd::convert::to_int16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const std::u16string& value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::u16string& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const std::u32string& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::u32string& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const std::wstring& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(std::wstring& value) {
-    return xtd::convert::to_int16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const char* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const char8* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char8* value) {
-    return xtd::convert::to_int16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const char16* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char16* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const char32* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(char32* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(const wchar* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// int16 result = as<int16>(value);
-  /// @endcode
-  template<>
-  inline int16 as<int16>(wchar* value) {
-    return xtd::convert::to_int16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::any value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(bool value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(xtd::byte value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char8 value) {
-    return xtd::convert::to_int32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char16 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char32 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(wchar value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(decimal value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(double value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(float value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(int16 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(int32 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(int64 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(slong value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(sbyte value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(uint16 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(uint32 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(uint64 value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(xtd::ulong value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const xtd::ustring& value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(xtd::ustring& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a int32.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// int32 result = as<int32>(value, 16);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_int32(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const std::string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const std::u8string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::u8string& value) {
-    return xtd::convert::to_int32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const std::u16string& value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::u16string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const std::u32string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::u32string& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const std::wstring& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(std::wstring& value) {
-    return xtd::convert::to_int32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const char* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const char8* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char8* value) {
-    return xtd::convert::to_int32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const char16* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char16* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const char32* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(char32* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(const wchar* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// int32 result = as<int32>(value);
-  /// @endcode
-  template<>
-  inline int32 as<int32>(wchar* value) {
-    return xtd::convert::to_int32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::any value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(bool value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(xtd::byte value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char8 value) {
-    return xtd::convert::to_int64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char16 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char32 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(wchar value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(decimal value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(double value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(float value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(int16 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(int32 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(int64 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(slong value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(sbyte value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(uint16 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(uint32 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(uint64 value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(xtd::ulong value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const xtd::ustring& value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(xtd::ustring& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a int64.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// int64 result = as<int64>(value, 16);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_int64(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const std::string& value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::string& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const std::u8string& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::u8string& value) {
-    return xtd::convert::to_int64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const std::u16string& value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::u16string& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const std::u32string& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::u32string& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const std::wstring& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(std::wstring& value) {
-    return xtd::convert::to_int64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const char* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const char8* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char8* value) {
-    return xtd::convert::to_int64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const char16* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char16* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const char32* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(char32* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(const wchar* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new int64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// int64 result = as<int64>(value);
-  /// @endcode
-  template<>
-  inline int64 as<int64>(wchar* value) {
-    return xtd::convert::to_int64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::any value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(bool value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(xtd::byte value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char8 value) {
-    return xtd::convert::to_llong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char16 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char32 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(wchar value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(decimal value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(double value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(float value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(int16 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(int32 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(int64 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(slong value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(sbyte value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(uint16 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(uint32 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(uint64 value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(xtd::ulong value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const xtd::ustring& value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(xtd::ustring& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a slong.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// slong result = as<slong>(value, 16);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_llong(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const std::string& value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::string& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const std::u8string& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::u8string& value) {
-    return xtd::convert::to_llong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const std::u16string& value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::u16string& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const std::u32string& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::u32string& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const std::wstring& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(std::wstring& value) {
-    return xtd::convert::to_llong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const char* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const char8* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char8* value) {
-    return xtd::convert::to_llong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const char16* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char16* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const char32* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(char32* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(const wchar* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new slong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// slong result = as<slong>(value);
-  /// @endcode
-  template<>
-  inline slong as<slong>(wchar* value) {
-    return xtd::convert::to_llong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::any value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(bool value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(xtd::byte value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char8 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char16 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char32 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(wchar value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(decimal value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(double value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(float value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(int16 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(int32 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(int64 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(slong value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(sbyte value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(uint16 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(uint32 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(uint64 value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(xtd::ulong value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const xtd::ustring& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(xtd::ustring& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a sbyte.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// sbyte result = as<sbyte>(value, 16);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_sbyte(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const std::string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const std::u8string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::u8string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const std::u16string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::u16string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const std::u32string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::u32string& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const std::wstring& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(std::wstring& value) {
-    return xtd::convert::to_sbyte(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const char* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const char8* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char8* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const char16* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char16* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const char32* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(char32* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(const wchar* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new sbyte object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// sbyte result = as<sbyte>(value);
-  /// @endcode
-  template<>
-  inline sbyte as<sbyte>(wchar* value) {
-    return xtd::convert::to_sbyte(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::any value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(bool value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(xtd::byte value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char8 value) {
-    return xtd::convert::to_uint16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char16 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char32 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(wchar value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(decimal value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(double value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(float value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(int16 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(int32 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(int64 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(slong value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(sbyte value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(uint16 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(uint32 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(uint64 value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(xtd::ulong value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const xtd::ustring& value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(xtd::ustring& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a uint16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// uint16 result = as<uint16>(value, 16);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_uint16(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const std::string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const std::u8string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::u8string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const std::u16string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::u16string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const std::u32string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::u32string& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const std::wstring& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(std::wstring& value) {
-    return xtd::convert::to_uint16(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const char* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const char8* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char8* value) {
-    return xtd::convert::to_uint16(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const char16* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char16* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const char32* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(char32* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(const wchar* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint16 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// uint16 result = as<uint16>(value);
-  /// @endcode
-  template<>
-  inline uint16 as<uint16>(wchar* value) {
-    return xtd::convert::to_uint16(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::any value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(bool value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(xtd::byte value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char8 value) {
-    return xtd::convert::to_uint32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char16 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char32 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(wchar value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(decimal value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(double value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(float value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(int16 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(int32 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(int64 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(slong value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(sbyte value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(uint16 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(uint32 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(uint64 value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(xtd::ulong value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const xtd::ustring& value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(xtd::ustring& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a uint32.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// uint32 result = as<uint32>(value, 16);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_uint32(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const std::string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const std::u8string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::u8string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const std::u16string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::u16string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const std::u32string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::u32string& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const std::wstring& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(std::wstring& value) {
-    return xtd::convert::to_uint32(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const char* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const char8* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char8* value) {
-    return xtd::convert::to_uint32(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const char16* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char16* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const char32* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(char32* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(const wchar* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint32 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// uint32 result = as<uint32>(value);
-  /// @endcode
-  template<>
-  inline uint32 as<uint32>(wchar* value) {
-    return xtd::convert::to_uint32(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::any value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(bool value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(xtd::byte value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char8 value) {
-    return xtd::convert::to_uint64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char16 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char32 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(wchar value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(decimal value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(double value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(float value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(int16 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(int32 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(int64 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(slong value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(sbyte value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(uint16 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(uint32 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(uint64 value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(xtd::ulong value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const xtd::ustring& value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(xtd::ustring& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a uint64.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// uint64 result = as<uint64>(value, 16);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_uint64(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const std::string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const std::u8string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::u8string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const std::u16string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::u16string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const std::u32string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::u32string& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const std::wstring& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(std::wstring& value) {
-    return xtd::convert::to_uint64(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const char* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const char8* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char8* value) {
-    return xtd::convert::to_uint64(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const char16* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char16* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const char32* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(char32* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(const wchar* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new uint64 object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// uint64 result = as<uint64>(value);
-  /// @endcode
-  template<>
-  inline uint64 as<uint64>(wchar* value) {
-    return xtd::convert::to_uint64(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::any value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(bool value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(xtd::byte value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char8 value) {
-    return xtd::convert::to_ullong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char16 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char32 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(wchar value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(decimal value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(double value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(float value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(int16 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(int32 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(int64 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(slong value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(sbyte value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(uint16 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(uint32 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(uint64 value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(xtd::ulong value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const xtd::ustring& value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(xtd::ustring& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a xtd::ulong.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "0x2A";
-  /// xtd::ulong result = as<xtd::ulong>(value, 16);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const xtd::ustring& value, xtd::byte from_base) {
-    return xtd::convert::to_ullong(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const std::string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const std::u8string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::u8string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const std::u16string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::u16string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const std::u32string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::u32string& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const std::wstring& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(std::wstring& value) {
-    return xtd::convert::to_ullong(value);
-  }
-
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const char* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const char8* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char8* value) {
-    return xtd::convert::to_ullong(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const char16* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char16* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const char32* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(char32* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(const wchar* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::argument_exception value does not represent a bool.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"42";
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline xtd::ulong as<xtd::ulong>(wchar* value) {
-    return xtd::convert::to_ullong(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::any value = true;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(std::any value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// bool value = true;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(bool value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(xtd::byte value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::byte value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(xtd::byte value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char value = 'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(char value) {
-    return xtd::convert::to_string(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8 value = u8'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(char8 value) {
-    return xtd::convert::to_string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16 value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(char16 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32 value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(char32 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @exception xtd::invalid_cast_exception throws always exception.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar value = u'a';
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(wchar value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// decimal value = 42.50l;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(decimal value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// double value = 42.50;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(double value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// float value = 42.50f;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(float value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int16 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int16 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int16 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int32 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int32 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int32 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42l;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int64 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// int64 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(int64 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42ll;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(slong value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// slong value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(slong value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42ll;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(sbyte value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// sbyte value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(sbyte value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42u;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint16 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint16 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint16 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42u;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint32 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint32 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint32 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42ul;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint64 value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// uint64 value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(uint64 value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @return A new xtd::ulong object converted from value.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42ull;
-  /// xtd::ulong result = as<xtd::ulong>(value);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(xtd::ulong value) {
-    return xtd::convert::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @param value object to convert.
-  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
-  /// @return A new ustring object converted from value.
-  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// xtd::ulong value = 42;
-  /// ustring result = as<ustring>(value, 16);
-  /// @endcode
-  template<>
-  inline ustring as<ustring>(xtd::ulong value, xtd::byte from_base) {
-    return xtd::convert::to_string(value, from_base);
-  }
-  
-  // ___________________________________________________________________________________________
-  //                                                         xtd::convert_pointer specialization
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const button* value = new xtd::forms::button();
-  /// const control& result = as<xtd::forms::control>(*value);
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  const new_type_t& as(const current_type_t& value) {
-    thread_local static __as_enum__<new_type_t, current_type_t, typename std::conditional<std::is_enum<current_type_t>::value, std::true_type, std::false_type>::type> e;
-    return e.convert(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// button* value = new xtd::forms::button();
-  /// control& result = as<xtd::forms::control>(*value);
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  new_type_t& as(current_type_t& value) {
-    thread_local static __as_enum__<new_type_t, current_type_t, typename std::conditional<std::is_enum<current_type_t>::value, std::true_type, std::false_type>::type> e;
-    return e.convert(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const button* value = new xtd::forms::button();
-  /// const control* result = as<xtd::forms::control>(value);
-  /// @endcode
-  template<typename new_type_t, typename current_type_t>
-  const new_type_t* as(const current_type_t* value) {
-    return xtd::convert_pointer::to_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// button* value = new xtd::forms::button();
-  /// control* result = as<xtd::forms::control>(value);
-  /// @endcode
-  template<typename new_type_t, typename current_type_t>
-  new_type_t* as(current_type_t* value) {
-    return xtd::convert_pointer::to_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::unique_ptr<button> value = std::make_unique<xtd::forms::button>();
-  /// std::unique_ptr<control> result = as<xtd::forms::control>(value);
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  std::unique_ptr<new_type_t> as(std::unique_ptr<current_type_t>& value) {
-    return xtd::convert_pointer::to_unique_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::unique_ptr<control> result = as<xtd::forms::control>(std::make_unique<xtd::forms::button>());
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  std::unique_ptr<new_type_t> as(std::unique_ptr<current_type_t>&& value) {
-    return xtd::convert_pointer::to_unique_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const std::shared_ptr<button> value = std::make_shared<xtd::forms::button>();
-  /// const std::shared_ptr<control> result = as<xtd::forms::control>(value);
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  std::shared_ptr<new_type_t> as(const std::shared_ptr<current_type_t>& value) {
-    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// std::shared_ptr<control> result = as<xtd::forms::control>(std::make_shared<xtd::forms::button>());
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  std::shared_ptr<new_type_t> as(std::shared_ptr<current_type_t>& value) {
-    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const std::shared_ptr<button> value = std::make_shared<xtd::forms::button>();
-  /// const std::shared_ptr<control> result = as<xtd::forms::control>(value);
-  /// @endcode
-  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
-  template<typename new_type_t, typename current_type_t>
-  std::shared_ptr<new_type_t> as(std::shared_ptr<current_type_t>&& value) {
-    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
-  }
-  
-  // ___________________________________________________________________________________________
-  //                                                          xtd::convert_string specialization
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const std::string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  /// @code
-  /// string value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(std::string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const std::string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(std::string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const std::string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(std::string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const std::string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(std::string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const std::string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(std::string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const std::string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// string value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(std::string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const char* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const char* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* cvalue1 = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const char* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const char* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const char* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char* value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const char* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(char* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(char* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(char* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(char* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(char* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char* value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(char* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const xtd::ustring& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(xtd::ustring& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const xtd::ustring& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(xtd::ustring& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const xtd::ustring& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(xtd::ustring& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const xtd::ustring& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(xtd::ustring& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const xtd::ustring& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(xtd::ustring& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const xtd::ustring& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// ustring value = "Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(xtd::ustring& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const std::u8string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(std::u8string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const std::u8string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(std::u8string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const std::u8string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(std::u8string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const std::u8string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(std::u8string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const std::u8string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(std::u8string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const std::u8string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u8string value = u8"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(std::u8string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-#endif
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const char8* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const char8* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const char8* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const char8* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const char8* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char8* value = u8"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const char8* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(char8* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(char8* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(char8* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(char8* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(char8* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char8* value = u8"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(char8* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const std::u16string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(std::u16string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const std::u16string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(std::u16string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const std::u16string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = "Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(std::u16string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const std::u16string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(std::u16string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const std::u16string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(std::u16string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const std::u16string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u16string value = u"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(std::u16string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const char16* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const char16* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const char16* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const char16* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const char16* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char16* value = u"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const char16* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(char16* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(char16* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(char16* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(char16* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(char16* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char16* value = u"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(char16* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const std::u32string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(std::u32string& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const std::u32string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(std::u32string& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const std::u32string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(std::u32string& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const std::u32string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(std::u32string& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const std::u32string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(std::u32string& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const std::u32string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// u32string value = U"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(std::u32string& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const char32* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const char32* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const char32* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const char32* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const char32* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const char32* value = U"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const char32* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(char32* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(char32* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(char32* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(char32* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(char32* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// char32* value = U"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(char32* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const std::wstring& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(std::wstring& value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const std::wstring& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(std::wstring& value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const std::wstring& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(std::wstring& value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const std::wstring& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(std::wstring& value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const std::wstring& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(std::wstring& value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const std::wstring& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wstring value = L"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(std::wstring& value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(const wchar* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(const wchar* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(const wchar* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(const wchar* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(const wchar* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// const wchar* value = L"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(const wchar* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// string result = as<string>(value);
-  /// @endcode
-  template<>
-  inline std::string as<std::string>(wchar* value) {
-    return xtd::convert_string::to_string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// ustring result = as<ustring>(value);
-  /// @endcode
-  template<>
-  inline xtd::ustring as<xtd::ustring>(wchar* value) {
-    return xtd::convert_string::to_ustring(value);
-  }
-  
-#if defined(__cpp_lib_char8_t)
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// u8string result = as<u8string>(value);
-  /// @endcode
-  template<>
-  inline std::u8string as<std::u8string>(wchar* value) {
-    return xtd::convert_string::to_u8string(value);
-  }
-#endif
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// u16string result = as<u16string>(value);
-  /// @endcode
-  template<>
-  inline std::u16string as<std::u16string>(wchar* value) {
-    return xtd::convert_string::to_u16string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// u32string result = as<u32string>(value);
-  /// @endcode
-  template<>
-  inline std::u32string as<std::u32string>(wchar* value) {
-    return xtd::convert_string::to_u32string(value);
-  }
-  
-  /// @brief Casts a type into another type.
-  /// @par Header
-  /// @code #include <xtd/as> @endcode
-  /// @par Namespace
-  /// xtd
-  /// @par Library
-  /// xtd.core
-  /// @ingroup xtd_core
-  /// @par Examples
-  /// @code
-  /// wchar* value = L"Gammasoft";
-  /// wstring result = as<wstring>(value);
-  /// @endcode
-  template<>
-  inline std::wstring as<std::wstring>(wchar* value) {
-    return xtd::convert_string::to_wstring(value);
-  }
-}
 
 /// @cond
 template<typename new_type_t, typename current_type_t>
diff --git a/src/xtd.core/include/xtd/internal/__as_bool.h b/src/xtd.core/include/xtd/internal/__as_bool.h
new file mode 100644
index 000000000000..32def43b31f0
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_bool.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::any value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(bool value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(xtd::byte value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char8 value) {
+    return xtd::convert::to_boolean(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char16 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char32 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(wchar value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(decimal value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(double value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(float value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(int16 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(int32 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(int64 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(slong value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(sbyte value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(uint16 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(uint32 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(uint64 value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(xtd::ulong value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const xtd::ustring& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(xtd::ustring& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const std::string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const std::u8string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::u8string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const std::u16string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::u16string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const std::u32string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::u32string& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const std::wstring& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(std::wstring& value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const char* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const char8* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char8* value) {
+    return xtd::convert::to_boolean(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const char16* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char16* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const char32* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(char32* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(const wchar* value) {
+    return xtd::convert::to_boolean(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// bool result = as<bool>(value);
+  /// @endcode
+  template<>
+  inline bool as<bool>(wchar* value) {
+    return xtd::convert::to_boolean(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_byte.h b/src/xtd.core/include/xtd/internal/__as_byte.h
new file mode 100644
index 000000000000..9b417741e34a
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_byte.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::any value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(bool value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(xtd::byte value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char8 value) {
+    return xtd::convert::to_byte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char16 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char32 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(wchar value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(decimal value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(double value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(float value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(int16 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(int32 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(int64 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(slong value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(sbyte value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(uint16 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(uint32 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(uint64 value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(xtd::ulong value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a byte.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const xtd::ustring& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a byte.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(xtd::ustring& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a byte.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// xtd::byte result = as<xtd::byte>(value, 16);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_byte(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const std::string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const std::u8string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::u8string& value) {
+    return xtd::convert::to_byte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const std::u16string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::u16string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const std::u32string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::u32string& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const std::wstring& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(std::wstring& value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const char* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const char8* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char8* value) {
+    return xtd::convert::to_byte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const char16* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char16* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const char32* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(char32* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(const wchar* value) {
+    return xtd::convert::to_byte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::byte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// xtd::byte result = as<xtd::byte>(value);
+  /// @endcode
+  template<>
+  inline xtd::byte as<xtd::byte>(wchar* value) {
+    return xtd::convert::to_byte(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_char.h b/src/xtd.core/include/xtd/internal/__as_char.h
new file mode 100644
index 000000000000..86535027fbdb
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_char.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::any value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(bool value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(xtd::byte value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char value) {
+    return xtd::convert::to_char(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char8 value) {
+    return xtd::convert::to_char(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char16 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char32 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(wchar value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(decimal value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(double value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(float value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(int16 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(int32 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(int64 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(slong value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(sbyte value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(uint16 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(uint32 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(uint64 value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(xtd::ulong value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const xtd::ustring& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(xtd::ustring& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const std::string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const std::u8string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::u8string& value) {
+    return xtd::convert::to_char(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const std::u16string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::u16string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const std::u32string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::u32string& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const std::wstring& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(std::wstring& value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const char* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const char8* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char8* value) {
+    return xtd::convert::to_char(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const char16* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char16* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const char32* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(char32* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(const wchar* value) {
+    return xtd::convert::to_char(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// char result = as<char>(value);
+  /// @endcode
+  template<>
+  inline char as<char>(wchar* value) {
+    return xtd::convert::to_char(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_char16.h b/src/xtd.core/include/xtd/internal/__as_char16.h
new file mode 100644
index 000000000000..7d42fa6f7d81
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_char16.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::any value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(bool value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(xtd::byte value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char8 value) {
+    return xtd::convert::to_char16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char16 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char32 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(wchar value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(decimal value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(double value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(float value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(int16 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(int32 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(int64 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(slong value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(sbyte value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(uint16 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(uint32 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(uint64 value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(xtd::ulong value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const xtd::ustring& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(xtd::ustring& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const std::string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const std::u8string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::u8string& value) {
+    return xtd::convert::to_char16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const std::u16string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::u16string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const std::u32string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::u32string& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const std::wstring& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(std::wstring& value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const char* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const char8* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char8* value) {
+    return xtd::convert::to_char16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const char16* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char16* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const char32* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(char32* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(const wchar* value) {
+    return xtd::convert::to_char16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// char16 result = as<char16>(value);
+  /// @endcode
+  template<>
+  inline char16 as<char16>(wchar* value) {
+    return xtd::convert::to_char16(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_char32.h b/src/xtd.core/include/xtd/internal/__as_char32.h
new file mode 100644
index 000000000000..0fb7b547d1ed
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_char32.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::any value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(bool value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(xtd::byte value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char8 value) {
+    return xtd::convert::to_char32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char16 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char32 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(wchar value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(decimal value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(double value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(float value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(int16 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(int32 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(int64 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(slong value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(sbyte value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(uint16 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(uint32 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(uint64 value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(xtd::ulong value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const xtd::ustring& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(xtd::ustring& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const std::string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const std::u8string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::u8string& value) {
+    return xtd::convert::to_char32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const std::u16string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::u16string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const std::u32string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::u32string& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const std::wstring& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(std::wstring& value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const char* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const char8* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char8* value) {
+    return xtd::convert::to_char32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const char16* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char16* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const char32* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(char32* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(const wchar* value) {
+    return xtd::convert::to_char32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// char32 result = as<char32>(value);
+  /// @endcode
+  template<>
+  inline char32 as<char32>(wchar* value) {
+    return xtd::convert::to_char32(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_char8.h b/src/xtd.core/include/xtd/internal/__as_char8.h
new file mode 100644
index 000000000000..9032302437a0
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_char8.h
@@ -0,0 +1,882 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::any value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(bool value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(xtd::byte value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char8 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char16 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char32 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(wchar value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(decimal value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(double value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(float value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(int16 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(int32 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(int64 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(slong value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(sbyte value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(uint16 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(uint32 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(uint64 value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(xtd::ulong value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const xtd::ustring& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(xtd::ustring& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const std::string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const std::u8string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::u8string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const std::u16string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::u16string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const std::u32string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::u32string& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const std::wstring& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(std::wstring& value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const char* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const char8* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char8* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const char16* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char16* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const char32* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(char32* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(const wchar* value) {
+    return xtd::convert::to_char8(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new char8 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// char8 result = as<char8>(value);
+  /// @endcode
+  template<>
+  inline char8 as<char8>(wchar* value) {
+    return xtd::convert::to_char8(value);
+  }
+#endif
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_decimal.h b/src/xtd.core/include/xtd/internal/__as_decimal.h
new file mode 100644
index 000000000000..fb936adb75ab
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_decimal.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::any value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(bool value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(xtd::byte value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char8 value) {
+    return xtd::convert::to_decimal(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char16 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char32 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(wchar value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(decimal value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(double value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(float value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(int16 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(int32 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(int64 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(slong value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(sbyte value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(uint16 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(uint32 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(uint64 value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(xtd::ulong value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const xtd::ustring& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(xtd::ustring& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const std::string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const std::u8string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::u8string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const std::u16string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::u16string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const std::u32string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::u32string& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const std::wstring& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(std::wstring& value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const char* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const char8* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char8* value) {
+    return xtd::convert::to_decimal(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const char16* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char16* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const char32* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(char32* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(const wchar* value) {
+    return xtd::convert::to_decimal(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new decimal object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// decimal result = as<decimal>(value);
+  /// @endcode
+  template<>
+  inline decimal as<decimal>(wchar* value) {
+    return xtd::convert::to_decimal(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_double.h b/src/xtd.core/include/xtd/internal/__as_double.h
new file mode 100644
index 000000000000..1324ca39fb13
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_double.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::any value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(bool value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(xtd::byte value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char value) {
+    return xtd::convert::to_double(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char8 value) {
+    return xtd::convert::to_double(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char16 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char32 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(wchar value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(decimal value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(double value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(float value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(int16 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(int32 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(int64 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(slong value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(sbyte value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(uint16 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(uint32 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(uint64 value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(xtd::ulong value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const xtd::ustring& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(xtd::ustring& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const std::string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const std::u8string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::u8string& value) {
+    return xtd::convert::to_double(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const std::u16string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::u16string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const std::u32string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::u32string& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const std::wstring& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(std::wstring& value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const char* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const char8* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char8* value) {
+    return xtd::convert::to_double(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const char16* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char16* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const char32* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(char32* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(const wchar* value) {
+    return xtd::convert::to_double(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new double object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// double result = as<double>(value);
+  /// @endcode
+  template<>
+  inline double as<double>(wchar* value) {
+    return xtd::convert::to_double(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_float.h b/src/xtd.core/include/xtd/internal/__as_float.h
new file mode 100644
index 000000000000..50c5b54a5f46
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_float.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::any value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(bool value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(xtd::byte value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char value) {
+    return xtd::convert::to_single(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char8 value) {
+    return xtd::convert::to_single(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char16 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char32 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(wchar value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(decimal value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(double value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(float value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(int16 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(int32 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(int64 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(slong value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(sbyte value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(uint16 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(uint32 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(uint64 value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(xtd::ulong value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const xtd::ustring& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(xtd::ustring& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const std::string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const std::u8string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::u8string& value) {
+    return xtd::convert::to_single(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const std::u16string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::u16string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const std::u32string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::u32string& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const std::wstring& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(std::wstring& value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const char* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const char8* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char8* value) {
+    return xtd::convert::to_single(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const char16* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char16* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const char32* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(char32* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(const wchar* value) {
+    return xtd::convert::to_single(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new float object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// float result = as<float>(value);
+  /// @endcode
+  template<>
+  inline float as<float>(wchar* value) {
+    return xtd::convert::to_single(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_generic.h b/src/xtd.core/include/xtd/internal/__as_generic.h
new file mode 100644
index 000000000000..c5b67df8fc9e
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_generic.h
@@ -0,0 +1,932 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new bool object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = 42;
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(std::any value) {
+    try {
+      return std::any_cast<new_type_t>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(bool value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(xtd::byte value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char8 value) {
+    return static_cast<new_type_t>(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u'a';
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char16 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = U'a';
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char32 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = L'a';
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(wchar value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.0l;
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(decimal value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.0;
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(double value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.0f;
+  /// int result = as<int>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(float value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(int16 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(int32 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(int64 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(slong value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(sbyte value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(uint16 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(uint32 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(uint64 value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42;
+  /// float result = as<float>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(xtd::ulong value) {
+    return static_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// object result = as<object>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const xtd::ustring& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// object result = as<object>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(xtd::ustring& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @cond
+  template<typename new_type_t>
+  new_type_t as(const xtd::ustring& value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(xtd::byte value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(int16 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(int32 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(int64 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(slong value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(sbyte value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(uint16 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(uint32 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(uint64 value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  template<typename new_type_t>
+  new_type_t as(xtd::ulong value, xtd::byte from_base) {
+    throw invalid_cast_exception {csf_};
+  }
+  /// @endcond
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(const std::string& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(std::string& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(const std::u8string& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(std::u8string& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(const std::u16string& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(std::u16string& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(const std::u32string& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(std::u32string& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(const std::wstring& value) {
+    try {
+      return dynamic_cast<const new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @exception xtd::invalid_cast_exception value bad type
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  template<typename new_type_t>
+  new_type_t as(std::wstring& value) {
+    try {
+      return dynamic_cast<new_type_t&>(value);
+    } catch (const std::exception& e) {
+      throw invalid_cast_exception(e.what(), csf_);
+    }
+    throw std::bad_cast();
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const char* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const char8* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char8* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const char16* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char16* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const char32* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(char32* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(const wchar* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new new_type_t object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// intptr result = as<intptr>(value);
+  /// @endcode
+  template<typename new_type_t>
+  new_type_t as(wchar* value) {
+    return reinterpret_cast<new_type_t>(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_int16.h b/src/xtd.core/include/xtd/internal/__as_int16.h
new file mode 100644
index 000000000000..996e458e1e7c
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_int16.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::any value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(bool value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(xtd::byte value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char8 value) {
+    return xtd::convert::to_int16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char16 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char32 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(wchar value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(decimal value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(double value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(float value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(int16 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(int32 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(int64 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(slong value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(sbyte value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(uint16 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(uint32 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(uint64 value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(xtd::ulong value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const xtd::ustring& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(xtd::ustring& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a int16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// int16 result = as<int16>(value, 16);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_int16(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const std::string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const std::u8string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::u8string& value) {
+    return xtd::convert::to_int16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const std::u16string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::u16string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const std::u32string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::u32string& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const std::wstring& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(std::wstring& value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const char* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const char8* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char8* value) {
+    return xtd::convert::to_int16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const char16* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char16* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const char32* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(char32* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(const wchar* value) {
+    return xtd::convert::to_int16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// int16 result = as<int16>(value);
+  /// @endcode
+  template<>
+  inline int16 as<int16>(wchar* value) {
+    return xtd::convert::to_int16(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_int32.h b/src/xtd.core/include/xtd/internal/__as_int32.h
new file mode 100644
index 000000000000..c57220ca64a3
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_int32.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::any value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(bool value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(xtd::byte value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char8 value) {
+    return xtd::convert::to_int32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char16 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char32 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(wchar value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(decimal value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(double value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(float value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(int16 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(int32 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(int64 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(slong value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(sbyte value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(uint16 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(uint32 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(uint64 value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(xtd::ulong value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const xtd::ustring& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(xtd::ustring& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a int32.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// int32 result = as<int32>(value, 16);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_int32(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const std::string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const std::u8string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::u8string& value) {
+    return xtd::convert::to_int32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const std::u16string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::u16string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const std::u32string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::u32string& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const std::wstring& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(std::wstring& value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const char* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const char8* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char8* value) {
+    return xtd::convert::to_int32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const char16* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char16* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const char32* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(char32* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(const wchar* value) {
+    return xtd::convert::to_int32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// int32 result = as<int32>(value);
+  /// @endcode
+  template<>
+  inline int32 as<int32>(wchar* value) {
+    return xtd::convert::to_int32(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_int64.h b/src/xtd.core/include/xtd/internal/__as_int64.h
new file mode 100644
index 000000000000..80fd721aba96
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_int64.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::any value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(bool value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(xtd::byte value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char8 value) {
+    return xtd::convert::to_int64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char16 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char32 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(wchar value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(decimal value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(double value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(float value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(int16 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(int32 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(int64 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(slong value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(sbyte value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(uint16 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(uint32 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(uint64 value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(xtd::ulong value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const xtd::ustring& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(xtd::ustring& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a int64.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// int64 result = as<int64>(value, 16);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_int64(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const std::string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const std::u8string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::u8string& value) {
+    return xtd::convert::to_int64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const std::u16string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::u16string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const std::u32string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::u32string& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const std::wstring& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(std::wstring& value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const char* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const char8* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char8* value) {
+    return xtd::convert::to_int64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const char16* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char16* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const char32* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(char32* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(const wchar* value) {
+    return xtd::convert::to_int64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new int64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// int64 result = as<int64>(value);
+  /// @endcode
+  template<>
+  inline int64 as<int64>(wchar* value) {
+    return xtd::convert::to_int64(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_pointer.h b/src/xtd.core/include/xtd/internal/__as_pointer.h
new file mode 100644
index 000000000000..7cec8ccd6201
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_pointer.h
@@ -0,0 +1,181 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const button* value = new xtd::forms::button();
+  /// const control& result = as<xtd::forms::control>(*value);
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  const new_type_t& as(const current_type_t& value) {
+    thread_local static __as_enum__<new_type_t, current_type_t, typename std::conditional<std::is_enum<current_type_t>::value, std::true_type, std::false_type>::type> e;
+    return e.convert(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// button* value = new xtd::forms::button();
+  /// control& result = as<xtd::forms::control>(*value);
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  new_type_t& as(current_type_t& value) {
+    thread_local static __as_enum__<new_type_t, current_type_t, typename std::conditional<std::is_enum<current_type_t>::value, std::true_type, std::false_type>::type> e;
+    return e.convert(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const button* value = new xtd::forms::button();
+  /// const control* result = as<xtd::forms::control>(value);
+  /// @endcode
+  template<typename new_type_t, typename current_type_t>
+  const new_type_t* as(const current_type_t* value) {
+    return xtd::convert_pointer::to_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// button* value = new xtd::forms::button();
+  /// control* result = as<xtd::forms::control>(value);
+  /// @endcode
+  template<typename new_type_t, typename current_type_t>
+  new_type_t* as(current_type_t* value) {
+    return xtd::convert_pointer::to_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::unique_ptr<button> value = std::make_unique<xtd::forms::button>();
+  /// std::unique_ptr<control> result = as<xtd::forms::control>(value);
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  std::unique_ptr<new_type_t> as(std::unique_ptr<current_type_t>& value) {
+    return xtd::convert_pointer::to_unique_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::unique_ptr<control> result = as<xtd::forms::control>(std::make_unique<xtd::forms::button>());
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  std::unique_ptr<new_type_t> as(std::unique_ptr<current_type_t>&& value) {
+    return xtd::convert_pointer::to_unique_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const std::shared_ptr<button> value = std::make_shared<xtd::forms::button>();
+  /// const std::shared_ptr<control> result = as<xtd::forms::control>(value);
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  std::shared_ptr<new_type_t> as(const std::shared_ptr<current_type_t>& value) {
+    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::shared_ptr<control> result = as<xtd::forms::control>(std::make_shared<xtd::forms::button>());
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  std::shared_ptr<new_type_t> as(std::shared_ptr<current_type_t>& value) {
+    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const std::shared_ptr<button> value = std::make_shared<xtd::forms::button>();
+  /// const std::shared_ptr<control> result = as<xtd::forms::control>(value);
+  /// @endcode
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  template<typename new_type_t, typename current_type_t>
+  std::shared_ptr<new_type_t> as(std::shared_ptr<current_type_t>&& value) {
+    return xtd::convert_pointer::to_shared_ptr<new_type_t>(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_sbyte.h b/src/xtd.core/include/xtd/internal/__as_sbyte.h
new file mode 100644
index 000000000000..c3d3ce8a64c4
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_sbyte.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::any value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(bool value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(xtd::byte value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char8 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char16 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char32 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(wchar value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(decimal value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(double value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(float value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(int16 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(int32 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(int64 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(slong value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(sbyte value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(uint16 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(uint32 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(uint64 value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(xtd::ulong value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const xtd::ustring& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(xtd::ustring& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a sbyte.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// sbyte result = as<sbyte>(value, 16);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_sbyte(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const std::string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const std::u8string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::u8string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const std::u16string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::u16string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const std::u32string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::u32string& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const std::wstring& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(std::wstring& value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const char* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const char8* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char8* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const char16* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char16* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const char32* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(char32* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(const wchar* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new sbyte object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// sbyte result = as<sbyte>(value);
+  /// @endcode
+  template<>
+  inline sbyte as<sbyte>(wchar* value) {
+    return xtd::convert::to_sbyte(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_slong.h b/src/xtd.core/include/xtd/internal/__as_slong.h
new file mode 100644
index 000000000000..e6f6a2014635
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_slong.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::any value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(bool value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(xtd::byte value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char8 value) {
+    return xtd::convert::to_llong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char16 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char32 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(wchar value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(decimal value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(double value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(float value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(int16 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(int32 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(int64 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(slong value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(sbyte value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(uint16 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(uint32 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(uint64 value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(xtd::ulong value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const xtd::ustring& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(xtd::ustring& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a slong.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// slong result = as<slong>(value, 16);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_llong(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const std::string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const std::u8string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::u8string& value) {
+    return xtd::convert::to_llong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const std::u16string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::u16string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const std::u32string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::u32string& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const std::wstring& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(std::wstring& value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const char* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const char8* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char8* value) {
+    return xtd::convert::to_llong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const char16* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char16* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const char32* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(char32* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(const wchar* value) {
+    return xtd::convert::to_llong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new slong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// slong result = as<slong>(value);
+  /// @endcode
+  template<>
+  inline slong as<slong>(wchar* value) {
+    return xtd::convert::to_llong(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_string.h b/src/xtd.core/include/xtd/internal/__as_string.h
new file mode 100644
index 000000000000..1e71ce9a2e25
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_string.h
@@ -0,0 +1,2408 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const std::string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  /// @code
+  /// string value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(std::string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const std::string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(std::string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const std::string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(std::string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const std::string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(std::string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const std::string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(std::string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const std::string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(std::string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const char* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const char* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* cvalue1 = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const char* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const char* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const char* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const char* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(char* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(char* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(char* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(char* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(char* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(char* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const xtd::ustring& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(xtd::ustring& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const xtd::ustring& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(xtd::ustring& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const xtd::ustring& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(xtd::ustring& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const xtd::ustring& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(xtd::ustring& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const xtd::ustring& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(xtd::ustring& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const xtd::ustring& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(xtd::ustring& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const std::u8string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(std::u8string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const std::u8string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(std::u8string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const std::u8string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(std::u8string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const std::u8string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(std::u8string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const std::u8string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(std::u8string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const std::u8string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(std::u8string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+#endif
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const char8* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const char8* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const char8* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const char8* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const char8* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const char8* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(char8* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(char8* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(char8* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(char8* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(char8* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(char8* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const std::u16string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(std::u16string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const std::u16string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(std::u16string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const std::u16string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = "Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(std::u16string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const std::u16string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(std::u16string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const std::u16string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(std::u16string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const std::u16string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(std::u16string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const char16* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const char16* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const char16* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const char16* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const char16* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const char16* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(char16* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(char16* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(char16* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(char16* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(char16* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(char16* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const std::u32string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(std::u32string& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const std::u32string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(std::u32string& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const std::u32string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(std::u32string& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const std::u32string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(std::u32string& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const std::u32string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(std::u32string& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const std::u32string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(std::u32string& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const char32* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const char32* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const char32* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const char32* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const char32* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const char32* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(char32* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(char32* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(char32* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(char32* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(char32* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(char32* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const std::wstring& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(std::wstring& value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const std::wstring& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(std::wstring& value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const std::wstring& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(std::wstring& value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const std::wstring& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(std::wstring& value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const std::wstring& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(std::wstring& value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const std::wstring& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(std::wstring& value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(const wchar* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(const wchar* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(const wchar* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(const wchar* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(const wchar* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(const wchar* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// string result = as<string>(value);
+  /// @endcode
+  template<>
+  inline std::string as<std::string>(wchar* value) {
+    return xtd::convert_string::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// ustring result = as<ustring>(value);
+  /// @endcode
+  template<>
+  inline xtd::ustring as<xtd::ustring>(wchar* value) {
+    return xtd::convert_string::to_ustring(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// u8string result = as<u8string>(value);
+  /// @endcode
+  template<>
+  inline std::u8string as<std::u8string>(wchar* value) {
+    return xtd::convert_string::to_u8string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// u16string result = as<u16string>(value);
+  /// @endcode
+  template<>
+  inline std::u16string as<std::u16string>(wchar* value) {
+    return xtd::convert_string::to_u16string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// u32string result = as<u32string>(value);
+  /// @endcode
+  template<>
+  inline std::u32string as<std::u32string>(wchar* value) {
+    return xtd::convert_string::to_u32string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"Gammasoft";
+  /// wstring result = as<wstring>(value);
+  /// @endcode
+  template<>
+  inline std::wstring as<std::wstring>(wchar* value) {
+    return xtd::convert_string::to_wstring(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_uint16.h b/src/xtd.core/include/xtd/internal/__as_uint16.h
new file mode 100644
index 000000000000..fc7d6f006731
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_uint16.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::any value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(bool value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(xtd::byte value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char8 value) {
+    return xtd::convert::to_uint16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char16 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char32 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(wchar value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(decimal value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(double value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(float value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(int16 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(int32 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(int64 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(slong value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(sbyte value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(uint16 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(uint32 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(uint64 value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(xtd::ulong value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const xtd::ustring& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(xtd::ustring& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a uint16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// uint16 result = as<uint16>(value, 16);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_uint16(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const std::string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const std::u8string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::u8string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const std::u16string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::u16string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const std::u32string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::u32string& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const std::wstring& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(std::wstring& value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const char* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const char8* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char8* value) {
+    return xtd::convert::to_uint16(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const char16* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char16* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const char32* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(char32* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(const wchar* value) {
+    return xtd::convert::to_uint16(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint16 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// uint16 result = as<uint16>(value);
+  /// @endcode
+  template<>
+  inline uint16 as<uint16>(wchar* value) {
+    return xtd::convert::to_uint16(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_uint32.h b/src/xtd.core/include/xtd/internal/__as_uint32.h
new file mode 100644
index 000000000000..98a3fad753a9
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_uint32.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::any value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(bool value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(xtd::byte value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char8 value) {
+    return xtd::convert::to_uint32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char16 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char32 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(wchar value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(decimal value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(double value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(float value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(int16 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(int32 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(int64 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(slong value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(sbyte value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(uint16 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(uint32 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(uint64 value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(xtd::ulong value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const xtd::ustring& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(xtd::ustring& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a uint32.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// uint32 result = as<uint32>(value, 16);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_uint32(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const std::string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const std::u8string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::u8string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const std::u16string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::u16string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const std::u32string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::u32string& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const std::wstring& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(std::wstring& value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const char* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const char8* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char8* value) {
+    return xtd::convert::to_uint32(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const char16* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char16* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const char32* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(char32* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(const wchar* value) {
+    return xtd::convert::to_uint32(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint32 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// uint32 result = as<uint32>(value);
+  /// @endcode
+  template<>
+  inline uint32 as<uint32>(wchar* value) {
+    return xtd::convert::to_uint32(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_uint64.h b/src/xtd.core/include/xtd/internal/__as_uint64.h
new file mode 100644
index 000000000000..44fc412e44e3
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_uint64.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::any value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(bool value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(xtd::byte value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char8 value) {
+    return xtd::convert::to_uint64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char16 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char32 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(wchar value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(decimal value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(double value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(float value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(int16 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(int32 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(int64 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(slong value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(sbyte value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(uint16 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(uint32 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(uint64 value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(xtd::ulong value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const xtd::ustring& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(xtd::ustring& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a uint64.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// uint64 result = as<uint64>(value, 16);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_uint64(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const std::string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const std::u8string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::u8string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const std::u16string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::u16string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const std::u32string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::u32string& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const std::wstring& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(std::wstring& value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const char* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const char8* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char8* value) {
+    return xtd::convert::to_uint64(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const char16* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char16* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const char32* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(char32* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(const wchar* value) {
+    return xtd::convert::to_uint64(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new uint64 object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// uint64 result = as<uint64>(value);
+  /// @endcode
+  template<>
+  inline uint64 as<uint64>(wchar* value) {
+    return xtd::convert::to_uint64(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_ulong.h b/src/xtd.core/include/xtd/internal/__as_ulong.h
new file mode 100644
index 000000000000..4200b372b598
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_ulong.h
@@ -0,0 +1,908 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::any value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(bool value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(xtd::byte value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char8 value) {
+    return xtd::convert::to_ullong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char16 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char32 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(wchar value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(decimal value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(double value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(float value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(int16 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(int32 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(int64 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(slong value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(sbyte value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(uint16 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(uint32 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(uint64 value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(xtd::ulong value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const xtd::ustring& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(xtd::ustring& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a xtd::ulong.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "0x2A";
+  /// xtd::ulong result = as<xtd::ulong>(value, 16);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const xtd::ustring& value, xtd::byte from_base) {
+    return xtd::convert::to_ullong(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const std::string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const std::u8string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::u8string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const std::u16string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::u16string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const std::u32string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::u32string& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const std::wstring& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(std::wstring& value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const char* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const char8* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char8* value) {
+    return xtd::convert::to_ullong(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const char16* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char16* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const char32* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(char32* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(const wchar* value) {
+    return xtd::convert::to_ullong(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline xtd::ulong as<xtd::ulong>(wchar* value) {
+    return xtd::convert::to_ullong(value);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_ustring.h b/src/xtd.core/include/xtd/internal/__as_ustring.h
new file mode 100644
index 000000000000..7162654db0b0
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_ustring.h
@@ -0,0 +1,640 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(std::any value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(bool value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(xtd::byte value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(xtd::byte value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(char value) {
+    return xtd::convert::to_string(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(char8 value) {
+    return xtd::convert::to_string(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(char16 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(char32 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(wchar value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(decimal value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(double value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(float value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int16 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int16 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int32 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int32 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int64 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(int64 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(slong value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(slong value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(sbyte value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(sbyte value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint16 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint16 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint32 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint32 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint64 value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(uint64 value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new xtd::ulong object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// xtd::ulong result = as<xtd::ulong>(value);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(xtd::ulong value) {
+    return xtd::convert::to_string(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @param from_base The base of the number in value, which must be 2, 8, 10, or 16.
+  /// @return A new ustring object converted from value.
+  /// @exception xtd::argument_exception vfrom_base is not 2, 8, 10, or 16.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42;
+  /// ustring result = as<ustring>(value, 16);
+  /// @endcode
+  template<>
+  inline ustring as<ustring>(xtd::ulong value, xtd::byte from_base) {
+    return xtd::convert::to_string(value, from_base);
+  }
+}
diff --git a/src/xtd.core/include/xtd/internal/__as_wchar.h b/src/xtd.core/include/xtd/internal/__as_wchar.h
new file mode 100644
index 000000000000..5e19832c1802
--- /dev/null
+++ b/src/xtd.core/include/xtd/internal/__as_wchar.h
@@ -0,0 +1,886 @@
+/// @file
+/// @brief Contains xtd::as method.
+#pragma once
+
+/// @cond
+#if !defined(__XTD_CORE_INTERNAL__)
+#error "Do not include this file: Internal use only"
+#endif
+/// @endcond
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception the parameters is bad cast.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// std::any value = true;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::any value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// bool value = true;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(bool value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::byte value = 42;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(xtd::byte value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char value = 'a';
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8 value = u8'a';
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char8 value) {
+    return xtd::convert::to_wchar(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16 value = u'a';
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char16 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32 value = u'a';
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char32 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::invalid_cast_exception throws always exception.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar value = u'a';
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(wchar value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// decimal value = 42.50l;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(decimal value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// double value = 42.50;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(double value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// float value = 42.50f;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(float value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int16 value = 42;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(int16 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int32 value = 42;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(int32 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// int64 value = 42l;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(int64 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// slong value = 42ll;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(slong value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// sbyte value = 42ll;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(sbyte value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint16 value = 42u;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(uint16 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint32 value = 42u;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(uint32 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// uint64 value = 42ul;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(uint64 value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// xtd::ulong value = 42ull;
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(xtd::ulong value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const xtd::ustring& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// ustring value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(xtd::ustring& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const std::string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// string value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const std::u8string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u8string value = u8"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::u8string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const std::u16string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u16string value = u"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::u16string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const std::u32string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// u32string value = U"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::u32string& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const std::wstring& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wstring value = L"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(std::wstring& value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char* value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const char* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char* value = "42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+#if defined(__cpp_lib_char8_t)
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char8* value = u8"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const char8* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char8* value = u8"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char8* value) {
+    return xtd::convert::to_wchar(value);
+  }
+#endif
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char16* value = u"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const char16* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char16* value = u"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char16* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const char32* value = U"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const char32* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// char32* value = U"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(char32* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// const wchar* value = L"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(const wchar* value) {
+    return xtd::convert::to_wchar(value);
+  }
+  
+  /// @brief Casts a type into another type.
+  /// @param value object to convert.
+  /// @return A new wchar object converted from value.
+  /// @exception xtd::argument_exception value does not represent a bool.
+  /// @par Header
+  /// @code #include <xtd/as> @endcode
+  /// @par Namespace
+  /// xtd
+  /// @par Library
+  /// xtd.core
+  /// @ingroup xtd_core
+  /// @par Examples
+  /// @code
+  /// wchar* value = L"42";
+  /// wchar result = as<wchar>(value);
+  /// @endcode
+  template<>
+  inline wchar as<wchar>(wchar* value) {
+    return xtd::convert::to_wchar(value);
+  }
+}