fix!: Correct values of CreationCollisionOption enum

src/Uno.UWP/Storage/CreationCollisionOption.cs

@@ -1,14 +1,30 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+namespace Windows.Storage;
 
-namespace Windows.Storage
+/// <summary>
+/// Specifies what to do if a file or folder with the specified name already exists in the current folder when you create a new file or folder.
+/// </summary>
+public enum CreationCollisionOption
 {
-	public enum CreationCollisionOption
-	{
-		OpenIfExists,
-		ReplaceExisting,
-		GenerateUniqueName,
-		FailIfExists,
-	}
+	/// <summary>
+	/// Automatically append a number to the base of the specified name if the file or folder already exists.
+	/// For example, <c>if MyFile.txt</c> already exists, then the new file is named <c>MyFile (2).txt</c>.
+	/// If <c>MyFolder</c> already exists, then the new folder is named <c>MyFolder (2)</c>.
+	/// </summary>
+	GenerateUniqueName,
+
+	/// <summary>
+	/// Replace the existing item if the file or folder already exists.
+	/// </summary>
+	ReplaceExisting,
+
+	/// <summary>
+	/// Raise an exception of type System.Exception if the file or folder already exists.
+	/// Methods that don't explicitly pass a value from the CreationCollisionOption enumeration use the FailIfExists value as the default when you try to create, rename, copy, or move a file or folder.
+	/// </summary>
+	FailIfExists,
+
+	/// <summary>
+	/// Return the existing item if the file or folder already exists.
+	/// </summary>
+	OpenIfExists,
 }