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
- Missing check for `Array.Length` in Index/Range indexer on array
- Migrate Document Outline to Fluent TreeView
- IDE0028 incorrectly triggers for dictionary shallow cloning
- IntelliSense of C# does not respect (upper-/lower) case
- [Bug] VS 18.4.0 (Feb 2026): MEF Catalog construction failures — Missing Xamarin.VisualStudio.Interfaces v18.0.0.0 & LiveShare.WebEditors causing IDE features to crash (Exit code -2146232797)
- Remove `.mvid` section.
- Unable to find documentation on some enum values like PointMemberAccessExpression
- IDE0051 false positive for extension referenced from another extension
- Stop reading and emitting `.mvid` section for reference assemblies.
- Chained method calls are not formatted in VS18
- Docs
- C# not yet supported