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Test plan for "closed class hierarchies" feature

Area-Compilers

Feature - Closed Class Hierarchies

Status: Open.

Feature

#81039 In dotnet/roslyn;

· RikkiGibson opened on Nov 5, 2025

Test plan for "Unions"

Area-Compilers

Feature - Unions

Status: Open.

Feature

#81074 In dotnet/roslyn;

· AlekseyTs opened on Nov 6, 2025

Verify AsyncHelpers.HandleAsyncEntryPoint test execution

Area-Compilers

Status: Open.

#81097 In dotnet/roslyn;

· 333fred opened on Nov 7, 2025

Test plan for "Unsafe Evolution"

Area-Compilers

Feature - Unsafe Evolution

Status: Open.

Feature

#81207 In dotnet/roslyn;

· jjonescz opened on Nov 13, 2025

Deprecate RoslynCompilerType=Framework

Area-Compilers

Status: Open.

Feature

#81184 In dotnet/roslyn;

· jjonescz opened on Nov 12, 2025

Test plan for "extension indexers" feature

Area-Compilers

Feature - Extension Indexers

Status: Open.

Feature

#81505 In dotnet/roslyn;

· jcouv opened on Dec 1, 2025

Test plan for "dictionary expressions" feature

Area-Compilers

Feature - Dictionary Expressions

Status: Open.

Feature

#81860 In dotnet/roslyn;

· jcouv opened on Jan 5, 2026

Collection Expression Arguments public API

Area-Compilers

Experimental APITracks issues for experimental Roslyn APIs.Tracks issues for experimental Roslyn APIs.

Feature - Collection ArgumentsCollection expression with() argumentsCollection expression with() arguments

Status: Open.

Task

#82210 In dotnet/roslyn;

· 333fred opened on Jan 29, 2026

Add LangVersion for C# 15

Area-Compilers

Status: Open.

Task

#82212 In dotnet/roslyn;

· jcouv opened on Jan 29, 2026

New extension methods fails to provide the inline documentation and navigation (goto definition) fails (package references).

Area-IDE

Feature - Extension EverythingThe extension everything featureThe extension everything feature

Status: Open.

#82258 In dotnet/roslyn;

· olivier-spinelli opened on Feb 3, 2026

Finalize new public APIs shape for Unions feature and remove experimental marker from them

Area-Compilers

Feature - Unions

Status: Open.

Task

#82567 In dotnet/roslyn;

· AlekseyTs opened on Feb 27, 2026

Tracking issue for non-blocking PROTOTYPE comments for Unions feature

Area-Compilers

Feature - Unions

Status: Open.

#82636 In dotnet/roslyn;

· AlekseyTs opened on Mar 5, 2026

Unsafe Evolution public API

Area-Compilers

Experimental APITracks issues for experimental Roslyn APIs.Tracks issues for experimental Roslyn APIs.

Feature - Unsafe Evolution

Status: Open.

Task

#82789 In dotnet/roslyn;

· jjonescz opened on Mar 16, 2026

Consider using new Process API instead of CreateProcess sys-call

Area-Compilers

Concept-Design DebtEngineering Debt, Design Debt, or poor product code qualityEngineering Debt, Design Debt, or poor product code quality

Status: Open.

Bug

#82987 In dotnet/roslyn;

· adamsitnik opened on Mar 30, 2026