Repository Issues

dotnet/roslyn

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

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Stars
 (20,414 stars)
Forks
 (4,257 forks)
Indexed issues
 (638 indexed issues)
open beginner issues
 (633 open beginner issues)
Latest indexed
Aug 14, 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

638 indexed issues

Open
"Unused using" incorrectly reported in IDE
Area-CompilersBugIDE-CodeStylehelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #67473 · Mar 23, 2023 · C# · 20,414 stars

1 comment1 reaction0 assignees
Open
CS1705 must indicate which library with the conflict
Area-CompilersConcept-Diagnostic Clarityhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #66161 · Dec 30, 2022 · C# · 20,414 stars

1 comment0 reactions0 assignees
Open
Codegen of System.Nullable `is null` check is poor
4 - In ReviewArea-CompilersCode Gen QualityConcept-Design Debthelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #65091 · Oct 28, 2022 · C# · 20,414 stars

2 comments0 reactions0 assignees
Open
Reorder Tuple Members Refactoring
Area-IDEhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #64897 · Oct 21, 2022 · C# · 20,414 stars

0 comments0 reactions0 assignees
Open
IDE0059 incorrectly suggests removal of used variable
Area-IDEBugFeature - IDE0059help wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #64044 · Sep 15, 2022 · C# · 20,414 stars

2 comments1 reaction0 assignees
Open
Remove or document "CompilerDiagnostic" type
Area-AnalyzersConcept-Continuous Improvementhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #63938 · Sep 12, 2022 · C# · 20,414 stars

0 comments0 reactions0 assignees
Open
Improve ERR_InaccessibleSymbol2 VB diagnostic
Area-CompilersConcept-Diagnostic ClarityLanguage-VBhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #62790 · Jul 20, 2022 · C# · 20,414 stars

0 comments0 reactions0 assignees
Open
Possibly incorrect comment in definite assignment
Area-CompilersBugConcept-Design Debthelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

dotnet / roslyn · #62522 · Jul 9, 2022 · C# · 20,414 stars

0 comments0 reactions0 assignees