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
- Quick info and diagnostics in C# stops working after opening a Razor file for the second time
- NullableWalker NullReferenceException (TypeSymbolExtensions.IsInterfaceType) analyzing a local function in an MSBuildWorkspace-loaded compilation — regression 5.3.0 → 5.6.0
- Microsoft.CodeAnalysis.PublicApiAnalyzers changelog
- Enable granular NuGet package source mapping
- Navigate to source link ends up in random unrelated files
- Visual Studio 2026 option to rename in symbols in code instead of in a popup
- Watch pane: Intellisense autocompletion ignores the starting underscore
- IDE0027 ignores line-wrapped array return in accessor expression-body check
- Extract file-based app entry point heuristic
- `Microsoft.CodeAnalysis.BannedApiAnalyzers` has a really scarce README
- Docs
- C# not yet supported