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HTTP2: Huffman decoding implementation is inefficient

area-System.Net.Http

enhancementProduct code improvement that does NOT require public API changes/additionsProduct code improvement that does NOT require public API changes/additions

help wanted[up-for-grabs] Good issue for external contributors[up-for-grabs] Good issue for external contributors

tenet-performancePerformance related issuePerformance related issue

Status: Closed (completed).

#1506 In dotnet/runtime;

· by geoffkizer was closed on Jan 23, 2026

Support 24:00 in hh:mm for ISO8601 dates

area-System.DateTime

enhancementProduct code improvement that does NOT require public API changes/additionsProduct code improvement that does NOT require public API changes/additions

in-prThere is an active PR which will close this issue when it is mergedThere is an active PR which will close this issue when it is merged

Status: Closed (completed).

#12197 In dotnet/runtime;

· by JamesNK was closed on Feb 15, 2026

Improve test coverage of DateTime ParseExact with different DateTimeStyles

area-System.DateTime

in-prThere is an active PR which will close this issue when it is mergedThere is an active PR which will close this issue when it is merged

test-enhancementImprovements of test source codeImprovements of test source code

Status: Closed (completed).

#25295 In dotnet/runtime;

· by ahsonkhan was closed on Jan 26, 2026

FileSystemInfo File.ResolveLinkTarget(path, false) returns incorrect result for non-existent file

area-System.IO

bug

help wanted[up-for-grabs] Good issue for external contributors[up-for-grabs] Good issue for external contributors

os-linuxLinux OS (any supported distro)Linux OS (any supported distro)

Status: Closed (completed).

#98584 In dotnet/runtime;

· by jcurl was closed on Feb 8, 2026

[Docs] Update API docs for IServiceScopeFactory.CreateScope

area-Extensions-DependencyInjection

documentationDocumentation bug or enhancement, does not impact product or test codeDocumentation bug or enhancement, does not impact product or test code

Status: Closed (completed).

#104472 In dotnet/runtime;

· by lonix1 was closed on Feb 13, 2026

Synchronous call inside XDocument.LoadAsync

area-System.Xml

bug

Status: Closed (completed).

#100239 In dotnet/runtime;

· by Yozer was closed on Feb 4, 2026

What are the acceptance/success criteria for an improved S.C.G.Dictionary?

area-System.Collections

design-discussionOngoing discussion about design without consensusOngoing discussion about design without consensus

Status: Not planned (skipped).

#107830 In dotnet/runtime;

· by kg was closed on Jan 25, 2026

Regex does not match, given a character-range from non-peripheral minus

area-System.Text.RegularExpressions

bug

Status: Not planned (skipped).

#108335 In dotnet/runtime;

· by ItaiTzur76 was closed on Feb 8, 2026

[API Proposal]: DI container should respect generic constraints when resolving single instance.

api-suggestionEarly API idea and discussion, it is NOT ready for implementationEarly API idea and discussion, it is NOT ready for implementation

area-Extensions-DependencyInjection

needs-further-triageIssue has been initially triaged, but needs deeper consideration or reconsiderationIssue has been initially triaged, but needs deeper consideration or reconsideration

Status: Closed (completed).

#108874 In dotnet/runtime;

· by voroninp was closed on Jan 23, 2026

.NET Web Worker docs, samples, and project template

arch-wasmWebAssembly architectureWebAssembly architecture

area-System.Runtime.InteropServices.JavaScript

os-browserBrowser variant of arch-wasmBrowser variant of arch-wasm

Status: Closed (completed).

#95452 In dotnet/runtime;

· by pavelsavara was closed on Feb 6, 2026

[JIT] Codegen issue for <code>InlineArray</code> in <code>record</code>

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMICLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

tenet-performancePerformance related issuePerformance related issue

Status: Not planned (skipped).

#110968 In dotnet/runtime;

· by sfiruch was closed on Feb 3, 2026

Inconsistent MemoryCache stats

area-Extensions-Caching

help wanted[up-for-grabs] Good issue for external contributors[up-for-grabs] Good issue for external contributors

Status: Closed (completed).

#108333 In dotnet/runtime;

· by verdie-g was closed on Feb 15, 2026

Test failure: Microsoft.Extensions.Hosting.WindowsServiceLifetimeTests.ServiceCanStopItself

arch-arm64

area-Extensions-Hosting

blocking-clean-ci-optionalBlocking optional rolling runsBlocking optional rolling runs

JitStressCLR JIT issues involving JIT internal stress modesCLR JIT issues involving JIT internal stress modes

os-windows

Status: Closed (completed).

#112327 In dotnet/runtime;

· by v-wenyuxu was closed on Jan 28, 2026

Enable runtime code quality analyzers

area-Tools-ILLink.NET linker development as well as trimming analyzers.NET linker development as well as trimming analyzers

Status: Closed (completed).

#101562 In dotnet/runtime;

· by tlakollo was closed on Jan 27, 2026

Access violation at COMUnhandledExceptionFilter

area-ExceptionHandling-coreclr

Status: Closed (completed).

#115476 In dotnet/runtime;

· by dmalukov was closed on Feb 2, 2026

Provide support for alternative rounding modes for division and remainder of division.

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

area-System.Numerics

in-prThere is an active PR which will close this issue when it is mergedThere is an active PR which will close this issue when it is merged

Status: Closed (completed).

#93568 In dotnet/runtime;

· by tannergooding was closed on Jan 22, 2026

System.Text.Json - Generic converter type creation does not honour JsonNumberHandling preferences

area-System.Text.Json

enhancementProduct code improvement that does NOT require public API changes/additionsProduct code improvement that does NOT require public API changes/additions

Status: Closed (completed).

#120798 In dotnet/runtime;

· by storey247 was closed on Jan 23, 2026

[wasm][coreclr] callhelpers generator, pinvoke part

arch-wasmWebAssembly architectureWebAssembly architecture

area-VM-coreclr

Status: Merged (completed).

dotnet/runtimenumber 123090

#123090 In dotnet/runtime;

· by radekdoulik was closed on Jan 20, 2026

ZipArchiveEntry.ExtractToFile corrupt destination files on exception

area-System.IO.Compression

Status: Closed (completed).

#123059 In dotnet/runtime;

· by JCFruit was closed on Feb 11, 2026

[wasm][coreclr] Implement portable RhExceptionHandling_FailedAllocation

area-VM-coreclr

Status: Merged (completed).

dotnet/runtimenumber 123215

#123215 In dotnet/runtime;

· by radekdoulik was closed on Jan 22, 2026

[interp][coreclr] Fix calls to IL helpers from tailcalls

area-CodeGen-Interpreter-coreclr

Status: Merged (completed).

dotnet/runtimenumber 123225

#123225 In dotnet/runtime;

· by radekdoulik was closed on Jan 28, 2026

Authentication headers for HTTP Proxy are not sent proactively

area-System.Net.Http

discussion

needs-author-actionAn issue or pull request that requires more info or actions from the author.An issue or pull request that requires more info or actions from the author.

Status: Closed (completed).

#123363 In dotnet/runtime;

· by ptarjan was closed on Feb 10, 2026

[browser][wasm] update tryrun.cmake

area-Infrastructure

Status: Closed (completed).

#123684 In dotnet/runtime;

· by radekdoulik was closed on Jan 29, 2026

[wasm][coreclr] Fix reflection with large valuetypes

arch-wasmWebAssembly architectureWebAssembly architecture

area-VM-coreclr

Status: Merged (completed).

dotnet/runtimenumber 123759

#123759 In dotnet/runtime;

· by radekdoulik was closed on Feb 4, 2026

ArrayList IListWrapper integer overflow in BinarySearch

area-System.Collections

bug

Status: Closed (completed).

#123804 In dotnet/runtime;

· by vcsjones was closed on Feb 10, 2026