roslyn
https://github.com/dotnet/roslyn
C#
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
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- Issues
- Remove unnecessary indirection in VS
- Extension method calls provided by a class not in scope of the usings does not have an option to automatically add the required using directive
- Extensions: Confirm whether we should track nullable state for extension properties
- Visual Studio 2026 Only Displays Errors for Open Documents When Entire Solution is Selected
- Events don't require unsafe context for pointers in types
- Nullability analysis skips initializer on dynamic receiver
- Operator invocations don't require `unsafe` context when pointers are involved
- Unexpected Nullability warnings for properties
- IDE0370 (remove unnecessary suppression): allow to exclude non-annotated APIs
- Remove GenerateFilteredReferenceAssembliesTask workarounds
- Docs
- C# not yet supported