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OpenSep 14, 2026
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•Last updated This represents work which is not planned for a specific release.
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Specify what encodings of source files are recognized by Roslyn and add corresponding tests
Concept-PortabilityThe issue deals with portable code (portable libraries, etc.).The issue deals with portable code (portable libraries, etc.).help wantedThe issue is "up for grabs" - add a comment if you are interested in working on itThe issue is "up for grabs" - add a comment if you are interested in working on itTenet-LocalizationSome piece of UI isn’t localized, often due to hard-coding of strings or other visible elements.Some piece of UI isn’t localized, often due to hard-coding of strings or other visible elements.TestTest failures in roslyn-CITest failures in roslyn-CIStatus: Open.#410 In dotnet/roslyn;- Status: Open.#411 In dotnet/roslyn;
Missing check for
Array.Lengthin Index/Range indexer on arrayConcept-Design DebtEngineering Debt, Design Debt, or poor product code qualityEngineering Debt, Design Debt, or poor product code qualityStatus: Open.Unable to find documentation on some enum values like PointMemberAccessExpression
help wantedThe issue is "up for grabs" - add a comment if you are interested in working on itThe issue is "up for grabs" - add a comment if you are interested in working on itStatus: Open.SourceText created in didOpen LSP handler needs encoding and checksum algorithm
LSPissues related to the roslyn language server protocol implementationissues related to the roslyn language server protocol implementationStatus: Open.#63583 In dotnet/roslyn;Parenthesizing an expression duplicates diagnostics
Concept-Diagnostic ClarityThe issues deals with the ease of understanding of errors and warnings.The issues deals with the ease of understanding of errors and warnings.Status: Open.#71303 In dotnet/roslyn;Unable to disable current statement highlightment in VS2017 for C#
Developer CommunityThe issue was originally reported on https://developercommunity.visualstudio.comThe issue was originally reported on https://developercommunity.visualstudio.comStatus: Open.#36621 In dotnet/roslyn;- Status: Open.#73183 In dotnet/roslyn;
- Status: Open.#72149 In dotnet/roslyn;
Better optimizations around combining string concatenation and string interpolation
Code Gen QualityRoom for improvement in the quality of the compiler's generated codeRoom for improvement in the quality of the compiler's generated codeStatus: Open.#73736 In dotnet/roslyn;- Status: Open.#75272 In dotnet/roslyn;
- Status: Open.#73596 In dotnet/roslyn;
Collection expression span optimization should reuse temps when possible
Code Gen QualityRoom for improvement in the quality of the compiler's generated codeRoom for improvement in the quality of the compiler's generated codeStatus: Open.#73269 In dotnet/roslyn;Remove
MetadataHelpers.GenericParameterAttributesAllowByRefLikein favor ofGenericParameterAttributes.AllowByRefLikeFeature - RefStructInterfaces`allows ref struct` (ref struct interfaces)`allows ref struct` (ref struct interfaces)Status: Open.#73548 In dotnet/roslyn;- Status: Open.#74393 In dotnet/roslyn;
Unexpected nullability warning is reported for erroneous conditional assignment
Feature - Nullable Reference TypesNullable Reference TypesNullable Reference TypesStatus: Open.#72912 In dotnet/roslyn;Meaningless nullability warning is reported for deconstruction
Feature - Nullable Reference TypesNullable Reference TypesNullable Reference TypesStatus: Open.#72913 In dotnet/roslyn;Unexpected control flow graph verification failure for a erroneous nested collection initializer
Feature - IOperationIOperationIOperationStatus: Open.#72931 In dotnet/roslyn;- Status: Open.#73022 In dotnet/roslyn;
Make MetadataDisplayFormat public
api-needs-workAPI needs work before it is approved, it is NOT ready for implementationAPI needs work before it is approved, it is NOT ready for implementationConcept-APIThis issue involves adding, removing, clarification, or modification of an API.This issue involves adding, removing, clarification, or modification of an API.Status: Open.#72844 In dotnet/roslyn;- Status: Open.#73188 In dotnet/roslyn;
- Status: Open.#73310 In dotnet/roslyn;
Consider improving langversion diagnostics for "unsafe in iterators" feature
Concept-Diagnostic ClarityThe issues deals with the ease of understanding of errors and warnings.The issues deals with the ease of understanding of errors and warnings.Status: Open.#73280 In dotnet/roslyn;Possibly unexpected behavior of nullable analysis around dynamic operators.
Feature - Nullable Reference TypesNullable Reference TypesNullable Reference TypesStatus: Open.#72906 In dotnet/roslyn;records with pattern: strange behavior
Concept-Diagnostic ClarityThe issues deals with the ease of understanding of errors and warnings.The issues deals with the ease of understanding of errors and warnings.Status: Open.#72822 In dotnet/roslyn;