microsoft/vs-threading

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The Microsoft.VisualStudio.Threading is a xplat library that provides many threading and synchronization primitives used in Visual Studio and other applications.

Stars: 1k
Forks: 160
Open beginner issues: 0
Indexed issues: 73
Avg merge: 1d 12h
Merged PRs (30d): 28

Dominant language: C#
License: No license data
Last GitHub push: Sep 10, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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73 open issues indexed

VSTHRD002 and VSTHRD010 - Performance issues? Open

analyzers

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/vs-threading#1526 · 9 comments · Opened Dec 11, 2025
Docs for !dumpasync still reference old SosThreadingTools NuPkg Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

microsoft/vs-threading#1483 · 1 comment · Opened Aug 21, 2025
Dependency Dashboard Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/vs-threading#1389 · Opened Feb 4, 2025
!dumpasync fails in WinDBG for 32-bit processes Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/vs-threading#1381 · Opened Jan 23, 2025
ReentrantSemaphore - Implement EnterAsync with timeout Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/vs-threading#1362 · 3 comments · Opened Dec 19, 2024
VSTHRD010 triggers on method defining delegates that require the main thread Open

analyzers bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/vs-threading#1358 · Opened Oct 16, 2024
Can MSDN documentation point to source? Open

documentation

microsoft/vs-threading#1344 · 2 comments · 1 reaction · 1 assignee · Opened Aug 6, 2024
VSTHRD200 should be able to have method type configured Open

analyzers

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/vs-threading#1327 · 1 comment · Opened Jun 4, 2024
Analyzers for lock primitives that need thread affinity Open

analyzers enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/vs-threading#1313 · Opened May 16, 2024
New API consideration: JoinableTaskContext.OnMainThreadBlocked Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/vs-threading#1273 · 6 comments · Opened Jan 17, 2024
Dispatcher-based JoinableTaskFactory should post messages more conservatively Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/vs-threading#1272 · Opened Jan 9, 2024
JoinableTaskContext.IsOnMainThread should satisfy VSTHRD010 Open

analyzers enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/vs-threading#1100 · 1 comment · Opened Oct 29, 2022
VSTHRD010 flags on chained constructor call to base, thread-affinitized type Open

analyzers bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#1089 · Opened Sep 13, 2022
Unstable tests Open

test bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

microsoft/vs-threading#1041 · Opened May 19, 2022
Provide a non-net472 alternative to ThrowIfNotOnUIThread to satisfy VSTHRD010 Open

analyzers enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#1025 · 3 comments · Opened Apr 20, 2022
VSTHRD010 for callers of method that switches to main thread Open

analyzers bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#993 · 1 comment · Opened Mar 1, 2022
Add `DisposableAsyncLazy<T>` class to simplify guaranteed disposal of values Open

enhancement

microsoft/vs-threading#953 · 3 reactions · 1 assignee · Opened Nov 17, 2021
Add group cancellation support to `AsyncLazy<T>` value factory Open

enhancement

microsoft/vs-threading#952 · 2 comments · 2 reactions · 1 assignee · Opened Nov 16, 2021
Installing Nuget package Microsoft.VisualStudio.Threading.Analyzers breaks dotnet watch reload Open

analyzers

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#939 · Opened Oct 11, 2021
NuGet for test projects Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#885 · 3 comments · Opened Aug 1, 2021
Document meaning of asterisk in !dumpasync output Open

documentation

microsoft/vs-threading#882 · 1 comment · 1 assignee · Opened Jul 29, 2021
VSTHRD200 calculates all awaitable types, but only caches one Open

analyzers enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

microsoft/vs-threading#829 · 2 comments · Opened Apr 20, 2021
Add a thread validation rule for usage of GetObjectForIUnknown Open

analyzers

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/vs-threading#804 · 1 comment · Opened Mar 11, 2021
ValueTask misuse analyzers Open

analyzers

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/vs-threading#753 · 1 reaction · Opened Feb 2, 2021
Refactoring: Make method async and await call-sites Open

help wanted

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/vs-threading#746 · 6 comments · 4 reactions · Opened Jan 29, 2021
Free-threaded validation sample not working Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#727 · Opened Jan 1, 2021
Cannot refer to a property/accessor in MainThreadAssertingMethods and hence VSTHRD010 Open

analyzers enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/vs-threading#692 · 1 reaction · Opened Oct 8, 2020
VSTHRD110: Analyzer unable to detect pass-through asynchronous method that is not awaited when it is used as an Action parameter. Open

analyzers bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#630 · 1 comment · 2 reactions · Opened May 24, 2020
Do AsyncSemaphore awaiters get called even after disposal? Open

bug

microsoft/vs-threading#592 · 1 assignee · Opened Feb 21, 2020
VSTHRD010 raises a false positive with eager linq queries Open

analyzers

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#577 · Opened Dec 27, 2019
Incorrect state machine names in VB code Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#563 · 2 comments · 1 reaction · Opened Nov 20, 2019
Support for thread affinity distinguished per property accessor Open

analyzers enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/vs-threading#540 · 1 comment · Opened Oct 26, 2019
Unstable test: NoLeakForContestedRequests_ThatAreCanceled Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#530 · 1 comment · Opened Oct 10, 2019
Unstable test: ToTaskOnHandleSignaledAfterNonZeroTimeout Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#529 · 1 comment · Opened Oct 10, 2019
Move cookbook_vs.md to docs.microsoft.com Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/vs-threading#489 · 1 reaction · Opened Jun 18, 2019
Avoid reporting VSTHRD200 violation for async Main method when using System.CommandLine.DragonFruit Open

analyzers

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#488 · 1 reaction · Opened Jun 17, 2019
Unstable test: JoinAsyncShouldCompleteWithoutUIThreadAfterTaskCompletes Open

test bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#482 · Opened May 9, 2019
NoMainThreadDependencyAttribute Open

analyzers

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/vs-threading#475 · Opened Apr 2, 2019
AsyncLazy can duck tape two callers into the same thread Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#457 · 4 comments · Opened Jan 23, 2019
Unstable test: HangReportNotSuppressedOnLongRunningTaskCancelled Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/vs-threading#444 · Opened Dec 21, 2018
Unstable test: AsyncPumpReleasedAfterExecution Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 25/100

microsoft/vs-threading#433 · 1 comment · Opened Dec 17, 2018
Make SyncBlockingMethods a data-driven collection Open

analyzers enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/vs-threading#418 · Opened Nov 10, 2018
!dumpasync Failed to parse the output of !do 0000000000000000: Invalid parameter 0000000000000000 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/vs-threading#402 · 6 comments · Opened Oct 11, 2018
Analyzer proposal: Async methods should take a CancellationToken Open

analyzers enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/vs-threading#394 · 2 comments · 1 reaction · Opened Sep 23, 2018
Unstable test: UpgradeableReadLockAsyncSynchronousReleaseAllowsOtherUpgradeableReaders Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

microsoft/vs-threading#388 · Opened Sep 22, 2018
VSTHRD004 incorrectly fires on results of methods are returned to the caller Open

analyzers

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/vs-threading#377 · 1 comment · Opened Sep 19, 2018
Unstable test: HangReportNotSuppressedOnLongRunningTaskCompleted Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#361 · Opened Aug 29, 2018
Unstable test: HangReportNotSuppressedOnLongRunningTaskJoinCancelled Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/vs-threading#360 · 2 comments · Opened Aug 29, 2018
Unstable test: ExecuteAsync_Contested Open

test bug

Difficulty 3/5 1-2 days Newbie friendliness 30/100

microsoft/vs-threading#358 · Opened Aug 29, 2018
JoinableTaskSynchronizationContext should override CreateCopy() Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/vs-threading#352 · 2 comments · Opened Aug 14, 2018

microsoft/vs-threading

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