C# 12 Support and New Enhancements

Requirements to run

• Visual Studio 2022 (17.9.6) or .NET 8 (SDK 8.0.204)

Requirements to build

• Visual Studio 2022 (17.9.6) or .NET 8 (SDK 8.0.204)

New

• Handle C# 12 source codes
• Add NoSpaceAfterBrace and NoSpaceBeforeBrace analyzers
• EqualsNull analyzers provides a new option of Code Fix to replace:
  • … != null or … != null with the property pattern … is {} or !(… is {})
• IsNull analyzers provides a new option of Code Fix to replace:
  • !(… is null) or … is null with the property pattern … is {} or !(… is {})

Removed

• Remove the VSIX project from the solution

Changed

• Work with Visual Studio 2022
• Update dependent packages
• Improve installation: no longer need to manually edit csproj files
• Perform CI with GitHub Actions
• Switch LangVersion to 12.0
• Reformat source files with File-scoped namespace declarations
• Refactor with C# 12 features
• Enable EnforceExtendedAnalyzerRules
• Add test cases

Fixed

• Fix warnings
• Fix SingleTypeParameter analyzer to ignore the following cases:
  • The type name is T and it has one type parameter (e.g., public class T<U> …)
  • The type T is already contained in the type or member
• Fix documents