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dotnet/roslyn

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.

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 (20,414 stars)
Forks
 (4,257 forks)
Indexed issues
 (636 indexed issues)
open beginner issues
 (629 open beginner issues)
Latest indexed
Jul 17, 2026
Last GitHub push
May 15, 2026
License
MIT License
Contributing guide
Contributing guide
Code of conduct
Code of conduct
Dominant language
C#
PR merge metrics
 (Avg merge 6d 17h) (256 merged PRs in 30d)
Beginner labels
help wanted

Issues

632 open indexed issues

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Open
Bad comment
Area-CompilersDocumentationhelp wanted

dotnet/roslyn #15,589 opened Nov 29, 2016 · C# · 20,414 stars

Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Add IParameterSymbol.IsImplicitValueParameter API
Area-CompilersConcept-APIFeature Requesthelp wanted

dotnet/roslyn #14,275 opened Oct 4, 2016 · C# · 20,414 stars

Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
4 comments0 reactions0 assignees
Open
Bad diagnostic for OrElse operator with nullable types
Area-CompilersBugCommunityConcept-Diagnostic Clarityhelp wanted

dotnet/roslyn #14,098 opened Sep 27, 2016 · C# · 20,414 stars

Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
3 comments0 reactions0 assignees
Open
Roslyn rejects \U unicode characters in identifiers
Area-CompilersBugLanguage-C#Tenet-Localizationhelp wanted

dotnet/roslyn #13,560 opened Sep 2, 2016 · C# · 20,414 stars

Why recommendedNo comments yet · Has a beginner-friendly label
No comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions1 assignee
Open
/errorlogger add analyzer name in rule properties
Area-AnalyzersFeature Requesthelp wanted

dotnet/roslyn #13,521 opened Sep 1, 2016 · C# · 20,414 stars

Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment0 reactions0 assignees
Open
Incorrect indentation in LambdaRewriter
Area-CompilersBughelp wanted

dotnet/roslyn #12,709 opened Jul 24, 2016 · C# · 20,414 stars

Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
4 comments0 reactions0 assignees