Skip to content

Latest commit

 

History

History
47 lines (32 loc) · 1.83 KB

csharp.md

File metadata and controls

47 lines (32 loc) · 1.83 KB

C# updates in .NET 9 Preview 6

Here's a summary of what's new in C# in this preview release:

C# updates in .NET 9 Preview 6:

.NET 9 Preview 6:

Partial properties

C# 13 adds partial properties. Like partial methods their primary purpose is to support source generators. Partial methods have been available for many releases with additional improvements in C# 9. Partial properties are much like their partial method counterparts.

For example, starting with .NET 7 (C# 12), the regular expression source generator creates efficient code for methods:

[GeneratedRegex("abc|def")]
private static partial Regex AbcOrDefMethod();
 
if (AbcOrDefMethod().IsMatch(text))
{
   // Take action with matching text
}

The Regex source generator has been updated and if you prefer to use a property, you can also use:

[GeneratedRegex("abc|def")]
private static partial Regex AbcOrDefProperty { get; }
 
if (AbcOrDefProperty.IsMatch(text))
{
   // Take action with matching text
}

Partial properties will make it easier for source generator designers to create natural feeling APIs.

Get started with C# 13

There are a lot more features in C# 13 for you to try today. Be sure to read our recent blog on all of the features available in preview and our always up to date documentation on What's new in C# 13.