[tests] rename PlatformDetection.IsThreadingSupported -> PlatformDetection.IsNotSingleThreaded #123497

pavelsavara · 2026-01-22T14:52:33Z

…114441) * Update dependencies from https://github.com/dotnet/arcade build 20250408.7 Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions From Version 8.0.0-beta.25164.5 -> To Version 8.0.0-beta.25208.7 * Update dependencies from https://github.com/dotnet/arcade build 20250414.7 Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions From Version 8.0.0-beta.25164.5 -> To Version 8.0.0-beta.25214.7 * Update MicrosoftDotnetSdkInternalVersion to 8.0.115 --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com> Co-authored-by: Carlos Sánchez López <1175054+carlossanlop@users.noreply.github.com> Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

…ease/8.0-staging [automated] Merge branch 'release/8.0' => 'release/8.0-staging'

After the recent VS upgrade from 17.12.5 to 17.13.2 we started seeing access violations in the mono-aot-cross.exe when targetting wasm. We tracked it down to sgen_clz being miscompiled, we can workaround the compiler bug by switching from ternary condition to if/else. Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

…dotnet#114906) Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>

…OS/tvOS simulator jobs to `osx.14.arm64.open` and `osx.15.amd64.open` queues (dotnet#114633) iOSSimulator, tvOSSimulator, MacCatalyst pipelines are migrated to: - `osx.15.amd64.open` - `osx.14.arm64.open` (until `osx.15.arm64.open` has enough machines) ## Newly failing test scenarios Some new failures were discovered during the migration. The tests were disabled and tracking issues were open to monitor progress for enablement. - System.Net.Sockets.Tests.SocketOptionNameTest.MulticastInterface_Set_AnyInterface_Succeeds - System.IO.IsolatedStorage - System.IO. MemoryMappedFiles - System.Net.Sockets.Tests.SendTo_.*.Datagram_UDP_AccessDenied_Throws_DoesNotBind

…dotnet#115012) I noticed we were sending 30k workitems each day to various Helix queues, this is due to the outerloop pipeline having a schedule triggere which matches old preview branches or the staging branches. This fixes that and also sets it so that the trigger only applies if there are actual source changes. Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

* Fix Idn tests [Test Only] Port the Idna test fixes to support Unicode 15 * Minor fix * Fine tune the idn to Unicode versions * Add missing files

…rios (COM, C++/CLI, custom component host) could try to load coreclr from CWD There is a fallback for apps with no .deps.json where the host will consider the app directory for loading coreclr. In component hosting scenarios, we do not have an app path / directory. We were incorrectly going down the path of looking for coreclr next to the empty app directory, which resulted in looking in the current directory. This change skips that path for libhost scenarios. It also adds checks that the paths we determine for loading coreclr, hostpolicy, and hostfxr are absolute.

* new-dfr in one commit * fixes for decommitting large+huge and comments * only age regions during BGC * fix age_all_region_kinds condition. * fixing merge conflict. * fix merge issues. * PR Feedback --------- Co-authored-by: Mark Plesko <markples@microsoft.com>

… StartNewTlsSessionContext() to NetFx (dotnet#115008)

Co-authored-by: Jeremy Barton <jbarton@microsoft.com>

* Update dependencies from https://github.com/dotnet/emsdk build 20250419.2 Microsoft.SourceBuild.Intermediate.emsdk , Microsoft.NET.Workload.Emscripten.Current.Manifest-8.0.100 From Version 8.0.16-servicing.25211.4 -> To Version 8.0.16-servicing.25219.2 * Update dependencies from https://github.com/dotnet/emsdk build 20250422.2 Microsoft.SourceBuild.Intermediate.emsdk , Microsoft.NET.Workload.Emscripten.Current.Manifest-8.0.100 From Version 8.0.16-servicing.25211.4 -> To Version 8.0.16-servicing.25222.2 * Update dependencies from https://github.com/dotnet/emsdk build 20250423.2 Microsoft.SourceBuild.Intermediate.emsdk , Microsoft.NET.Workload.Emscripten.Current.Manifest-8.0.100 From Version 8.0.16-servicing.25211.4 -> To Version 8.0.16-servicing.25223.2 * Update dependencies from https://github.com/dotnet/emsdk build 2025050.3 Microsoft.SourceBuild.Intermediate.emsdk , Microsoft.NET.Workload.Emscripten.Current.Manifest-8.0.100 From Version 8.0.16-servicing.25211.4 -> To Version 8.0.16-servicing.25255.3 * Update dependencies from https://github.com/dotnet/emsdk build 20250508.1 Microsoft.SourceBuild.Intermediate.emsdk , Microsoft.NET.Workload.Emscripten.Current.Manifest-8.0.100 From Version 8.0.16-servicing.25211.4 -> To Version 8.0.17-servicing.25258.1 --------- Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

…ease/8.0-staging [automated] Merge branch 'release/8.0' => 'release/8.0-staging'

…-merge-8.0-2025-05-13-1454

…8.0-2025-05-13-1454 Merging internal commits for release/8.0

[manual] Merge release/8.0-staging into release/8.0

Co-authored-by: Oleksandr.Didyk <odidyk@microsoft.com>

…e now supporting multiple declarations. (dotnet#115077) * Account for CompilationMappingAttribute supporting multiple declarations. * Update package version --------- Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>

Co-authored-by: Maoni0 <maoni@microsoft.com>

Related to dotnet/source-build#5427

…et#121389) I detected changes in the release/8.0 branch which have not been merged yet to release/8.0-staging. I'm a robot and am configured to help you automatically keep release/8.0-staging up to date, so I've opened this PR. This PR merges commits made on release/8.0 by the following committers: * vseanreesermsft * dotnet-maestro[bot] ## Instructions for merging from UI This PR will not be auto-merged. When pull request checks pass, complete this PR by creating a merge commit, *not* a squash or rebase commit. <img alt="merge button instructions" src="https://i.imgur.com/GepcNJV.png" width="300" /> If this repo does not allow creating merge commits from the GitHub UI, use command line instructions. ## Instructions for merging via command line Run these commands to merge this pull request from the command line. ``` sh git fetch git checkout release/8.0 git pull --ff-only git checkout release/8.0-staging git pull --ff-only git merge --no-ff release/8.0 # If there are merge conflicts, resolve them and then run git merge --continue to complete the merge # Pushing the changes to the PR branch will re-trigger PR validation. git push https://github.com/dotnet/runtime HEAD:merge/release/8.0-to-release/8.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git push git@github.com:dotnet/runtime HEAD:merge/release/8.0-to-release/8.0-staging ``` </details> After PR checks are complete push the branch ``` git push ``` ## Instructions for resolving conflicts :warning: If there are merge conflicts, you will need to resolve them manually before merging. You can do this [using GitHub][resolve-github] or using the [command line][resolve-cli]. [resolve-github]: https://help.github.com/articles/resolving-a-merge-conflict-on-github/ [resolve-cli]: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ ## Instructions for updating this pull request Contributors to this repo have permission update this pull request by pushing to the branch 'merge/release/8.0-to-release/8.0-staging'. This can be done to resolve conflicts or make other changes to this pull request before it is merged. The provided examples assume that the remote is named 'origin'. If you have a different remote name, please replace 'origin' with the name of your remote. ``` git fetch git checkout -b merge/release/8.0-to-release/8.0-staging origin/release/8.0-staging git pull https://github.com/dotnet/runtime merge/release/8.0-to-release/8.0-staging (make changes) git commit -m "Updated PR with my changes" git push https://github.com/dotnet/runtime HEAD:merge/release/8.0-to-release/8.0-staging ``` <details> <summary>or if you are using SSH</summary> ``` git fetch git checkout -b merge/release/8.0-to-release/8.0-staging origin/release/8.0-staging git pull git@github.com:dotnet/runtime merge/release/8.0-to-release/8.0-staging (make changes) git commit -m "Updated PR with my changes" git push git@github.com:dotnet/runtime HEAD:merge/release/8.0-to-release/8.0-staging ``` </details> Contact .NET Core Engineering (dotnet/dnceng) if you have questions or issues. Also, if this PR was generated incorrectly, help us fix it. See https://github.com/dotnet/arcade/blob/main/.github/workflows/scripts/inter-branch-merge.ps1.

Related: - dotnet#115415 - dotnet#115501 - dotnet#115503 --------- Co-authored-by: Art Leonard <artl93@users.noreply.github.com> Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com> Co-authored-by: Tomas Weinfurt <tweinfurt@yahoo.com> Co-authored-by: yurai007 <dawid_jurek@vp.pl> Co-authored-by: Jan Kotas <jkotas@microsoft.com>

…net#122141)

…otnet#122502)

) This pull request updates the following dependencies [marker]: <> (Begin:e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) ## From https://github.com/dotnet/icu - **Subscription**: [e82a8e07-8d2b-4a71-e90f-08dbcfd41ade](https://maestro.dot.net/subscriptions?search=e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) - **Build**: [20251212.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=2859935) ([294543](https://maestro.dot.net/channel/3073/github:dotnet:icu/build/294543)) - **Date Produced**: December 12, 2025 8:16:11 PM UTC - **Commit**: [4bfba9f36e8667005d7a40ade385daabce5fc7d5](dotnet/icu@4bfba9f) - **Branch**: [dotnet/release/8.0](https://github.com/dotnet/icu/tree/dotnet/release/8.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [8.0.0-rtm.25565.1 to 8.0.0-rtm.25612.3][1] - Microsoft.NETCore.Runtime.ICU.Transport [1]: dotnet/icu@b565264...4bfba9f [DependencyUpdate]: <> (End) [marker]: <> (End:e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

…dotnet#122731) This pull request updates the following dependencies [marker]: <> (Begin:c0fef358-3848-4a30-a438-08dbcfd61a5a) ## From https://github.com/dotnet/hotreload-utils - **Subscription**: [c0fef358-3848-4a30-a438-08dbcfd61a5a](https://maestro.dot.net/subscriptions?search=c0fef358-3848-4a30-a438-08dbcfd61a5a) - **Build**: [20251225.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=2867020) ([295569](https://maestro.dot.net/channel/3073/github:dotnet:hotreload-utils/build/295569)) - **Date Produced**: December 25, 2025 11:22:01 AM UTC - **Commit**: [e7e99065bbd4a7b911d5cfa56b23d873d9675355](dotnet/hotreload-utils@e7e9906) - **Branch**: [release/8.0](https://github.com/dotnet/hotreload-utils/tree/release/8.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [8.0.0-alpha.0.25574.3 to 8.0.0-alpha.0.25625.3][1] - Microsoft.DotNet.HotReload.Utils.Generator.BuildTool [1]: dotnet/hotreload-utils@cf2f6ad...e7e9906 [DependencyUpdate]: <> (End) [marker]: <> (End:c0fef358-3848-4a30-a438-08dbcfd61a5a) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

…otnet#122735) This pull request updates the following dependencies [marker]: <> (Begin:855db5a2-4d17-4346-a439-08dbcfd61a5a) ## From https://github.com/dotnet/runtime-assets - **Subscription**: [855db5a2-4d17-4346-a439-08dbcfd61a5a](https://maestro.dot.net/subscriptions?search=855db5a2-4d17-4346-a439-08dbcfd61a5a) - **Build**: [20251225.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=2867033) ([295573](https://maestro.dot.net/channel/3073/github:dotnet:runtime-assets/build/295573)) - **Date Produced**: December 25, 2025 11:52:55 AM UTC - **Commit**: [98185bc6d28f41decb681555c343a62b3c6c165e](dotnet/runtime-assets@98185bc) - **Branch**: [release/8.0](https://github.com/dotnet/runtime-assets/tree/release/8.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [8.0.0-beta.25565.1 to 8.0.0-beta.25625.3][1] - Microsoft.DotNet.CilStrip.Sources - System.ComponentModel.TypeConverter.TestData - System.Data.Common.TestData - System.Drawing.Common.TestData - System.Formats.Tar.TestData - System.IO.Compression.TestData - System.IO.Packaging.TestData - System.Net.TestData - System.Private.Runtime.UnicodeData - System.Runtime.Numerics.TestData - System.Runtime.TimeZoneData - System.Security.Cryptography.X509Certificates.TestData - System.Text.RegularExpressions.TestData - System.Windows.Extensions.TestData [1]: dotnet/runtime-assets@40ac8f2...98185bc [DependencyUpdate]: <> (End) [marker]: <> (End:855db5a2-4d17-4346-a439-08dbcfd61a5a) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

) This pull request updates the following dependencies [marker]: <> (Begin:e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) ## From https://github.com/dotnet/icu - **Subscription**: [e82a8e07-8d2b-4a71-e90f-08dbcfd41ade](https://maestro.dot.net/subscriptions?search=e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) - **Build**: [20251225.2](https://dev.azure.com/dnceng/internal/_build/results?buildId=2867037) ([295579](https://maestro.dot.net/channel/3073/github:dotnet:icu/build/295579)) - **Date Produced**: December 25, 2025 12:12:34 PM UTC - **Commit**: [7e1e01ce174204fc50e1b221c59cbd2c7a752441](dotnet/icu@7e1e01c) - **Branch**: [dotnet/release/8.0](https://github.com/dotnet/icu/tree/dotnet/release/8.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [8.0.0-rtm.25612.3 to 8.0.0-rtm.25625.2][1] - Microsoft.NETCore.Runtime.ICU.Transport [1]: dotnet/icu@4bfba9f...7e1e01c [DependencyUpdate]: <> (End) [marker]: <> (End:e82a8e07-8d2b-4a71-e90f-08dbcfd41ade) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

…dotnet#122654) Fixes: dotnet#122653 `libopenssl3` is supported and installed by default on all of the supported distro releases listed at https://learn.microsoft.com/en-us/dotnet/core/install/linux-sles?tabs=dotnet8 and https://learn.microsoft.com/en-us/dotnet/core/install/linux-opensuse?tabs=dotnet8 `libopenssl3` is also supported and installed by default on openSUSE Tumbleweed release. This release does not have any other, older, version of this library.

…ine YAML files (dotnet#122417) Adds `fetchTags: false` to Azure Pipelines checkout steps to skip fetching git tags during repository checkout, reducing network overhead and improving checkout performance. ## Changes - Updated 8 YAML files containing 10 total checkout steps in `eng/pipelines/`: - Pipeline templates: `base-job.yml`, `xplat-job.yml`, `build-job.yml` - Stress test pipelines: `http.yml`, `ssl.yml` (2 occurrences each) - Path evaluation and build jobs: `evaluate-paths-job.yml`, `global-build-job.yml` - Official build jobs: `prepare-signed-artifacts.yml` Note: Changes to `eng/common/` templates were excluded as those are shared infrastructure files managed separately. ## Example ```yaml - checkout: self clean: true fetchDepth: $(checkoutFetchDepth) fetchTags: false # Added to skip tag fetching ```   <details> <summary>Original prompt</summary> > Update the checkout step in the runtime CI yml to specify fetchTags: false. </details>  --- ✨ Let Copilot coding agent [set things up for you](https://github.com/dotnet/runtime/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: elinor-fung <47805090+elinor-fung@users.noreply.github.com> Co-authored-by: Elinor Fung <elfung@microsoft.com>

…122199) Backport of dotnet#121351 to release/8.0-staging ## Customer Impact Fixes a customer-reported crash in ILLink analyzer in a net8.0 project that uses C# 14 extension members. Customer issue: dotnet#120728 ``` warning AD0001: Analyzer 'ILLink.RoslynAnalyzer.DynamicallyAccessedMembersAnalyzer' threw an exception of type 'System.InvalidCastException' with message 'Unable to cast object of type 'Microsoft.CodeAnalysis.CSharp.Symbols.PublicModel.NonErrorNamedTypeSymbol' to type 'Microsoft.CodeAnalysis.IMethodSymbol'.'. ``` ## Regression No - crash only happens for language features introduced after .NET 8 was released. ## Testing Tested locally. We can't add automated testing because this repo doesn't reference a new enough version of Roslyn to build tests with extension members. ## Risk Low, analyzer-only fix, with limited scope. <hr /> Fixes dotnet#120728 main PR dotnet#121351 # Description Backports fix for analyzer crash when encountering C# 14 extension members. The crash occurred because the analyzer assumed `parameter.ContainingSymbol` is always `IMethodSymbol`, which is false for extension member parameters where the container is an extension type. **Core analyzer changes:** - Remove `MethodParameterValue` constructors that cast `parameter.ContainingSymbol` to `IMethodSymbol` - Require explicit `IMethodSymbol` parameter in `ParameterProxy` constructor - Skip analysis for extension members in `GetParameterTargetValue` (return `TopValue` when `ContainingSymbol` is not `IMethodSymbol`) - Update `VisitInstanceReference` to use new `ParameterProxy` constructor (without unrelated static method checks) **Test infrastructure:** - Add `Microsoft.Net.Compilers.Toolset` package reference for C# preview features - Add workaround in `ResultChecker.cs` to skip validation of compiler-generated extension member types (`<>E__` prefix) - Add `ExtensionsDataFlow.cs` test (enabled) - Add `ExtensionMembersDataFlow.cs` test (disabled until C# 14 available) **Note:** NativeAOT test changes from original PR excluded as `ILCompiler.Trimming.Tests` doesn't exist in 8.0. # Customer Impact Without this fix, the Roslyn analyzer crashes when analyzing code that uses or references C# 14 extension members, breaking the build or IDE experience. # Regression No. This is a new feature compatibility fix for C# 14, not a regression from 8.0 functionality. # Testing - All 60 DataFlow analyzer tests pass - New `ExtensionsDataFlow` test validates fix for regular extension methods - ILLink.RoslynAnalyzer builds cleanly # Risk Low. Changes are surgical and isolated to extension member handling: - Early-exit paths for extension members prevent processing unsupported constructs - Existing code paths unchanged (all parameters with method containers work as before) - Test coverage validates no regressions in standard scenarios # Package authoring signed off? N/A - Changes are internal to analyzer implementation, no public API surface modified.  <details> <summary>Original prompt</summary> > Backport dotnet#121351 to release/8.0-staging. </details>  --- 💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey). --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: sbomer <787361+sbomer@users.noreply.github.com> Co-authored-by: Sven Boemer <sbomer@gmail.com>

…otnet#120589) (dotnet#122423) (cherry picked from commit eaafd7c) (cherry picked from commit 1905046) --------- Co-authored-by: Eric StJohn <ericstj@microsoft.com> Co-authored-by: Matous Kozak <matouskozak@seznam.cz> Co-authored-by: Steve Pfister <stpfiste@microsoft.com> Co-authored-by: Filip Navara <filip.navara@gmail.com>

…ference-packages (dotnet#123243) This pull request updates the following dependencies [marker]: <> (Begin:1626bff2-6010-444e-f998-08dbcfd3e5b0) ## From https://github.com/dotnet/source-build-reference-packages - **Subscription**: [1626bff2-6010-444e-f998-08dbcfd3e5b0](https://maestro.dot.net/subscriptions?search=1626bff2-6010-444e-f998-08dbcfd3e5b0) - **Build**: [20251215.3](https://dev.azure.com/dnceng/internal/_build/results?buildId=2861480) ([294695](https://maestro.dot.net/channel/3885/github:dotnet:source-build-reference-packages/build/294695)) - **Date Produced**: December 15, 2025 3:29:24 PM UTC - **Commit**: [44b5b62182b48c34c4b6aef28943ec3f3e82f214](dotnet/source-build-reference-packages@44b5b62) - **Branch**: [release/8.0](https://github.com/dotnet/source-build-reference-packages/tree/release/8.0) [DependencyUpdate]: <> (Begin) - **Dependency Updates**: - From [8.0.0-alpha.1.25522.3 to 8.0.0-alpha.1.25615.3][1] - Microsoft.SourceBuild.Intermediate.source-build-reference-packages [1]: dotnet/source-build-reference-packages@4491483...44b5b62 [DependencyUpdate]: <> (End) [marker]: <> (End:1626bff2-6010-444e-f998-08dbcfd3e5b0) Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

jkotas · 2026-01-22T15:11:23Z

I am wondering what the public API name for this would look. I would not be bet on the public API being called IsSingleThreaded.

Was there ever a discussion about exposing this as a public API? Should we have one? It may be best to get an API proposal going, and then rename everything to match the name of public API that we agree on.

akoeplinger · 2026-01-22T15:31:16Z

src/libraries/Common/tests/System/IO/Compression/CompressionStreamUnitTestBase.cs

        }

-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotSingleThreaded))]


was this one intentional?

Originally this was just merge conflict, but I was thinking that Stream.CopyTo could be blocking.

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

akoeplinger · 2026-01-22T15:44:43Z

there's also the internal Environment.IsSingleProcessor that is used for the same purpose

jkotas · 2026-01-22T15:47:21Z

Environment.IsSingleProcessor that is used for the same purpose

IsSingleProcessor is different from IsSingleThread/IsThreadingSupported. You can have multiple threads with IsSingleProcessor.

akoeplinger · 2026-01-22T15:53:35Z

@jkotas I vaguely remembered that it was used the same way, but I haven't checked deeply. I agree it is not a good name for this use case.

I just found #77541 which was an API suggestion for Thread.IsThreadStartSupported

pavelsavara · 2026-01-23T11:39:50Z

I screwed this branch, closing, sorry

Mirroring and others added 30 commits April 15, 2025 17:01

Merge commit '4f67954b64888688b52ad62c4bce8836f8e6e103'

efd5742

Merge pull request dotnet#114668 from dotnet/merge/release/8.0-to-rel…

557c9c9

…ease/8.0-staging [automated] Merge branch 'release/8.0' => 'release/8.0-staging'

[release/8.0-staging] Strip trailing slash from source dir for cmake4 (…

61c1fc4

…dotnet#114906) Co-authored-by: Adeel Mujahid <3840695+am11@users.noreply.github.com>

Update EOL OSes (dotnet#115028)

dbc3718

[Test Only] Fix Idn tests (dotnet#115030)

6233bec

* Fix Idn tests [Test Only] Port the Idna test fixes to support Unicode 15 * Minor fix * Fine tune the idn to Unicode versions * Add missing files

[release/8.0-staging] Don't expose TrustedCertificatesDirectory() and…

64c2e18

… StartNewTlsSessionContext() to NetFx (dotnet#115008)

Handle OSSL 3.4 change to SAN:othername formatting

9541e96

Co-authored-by: Jeremy Barton <jbarton@microsoft.com>

Update branding to 8.0.17 (dotnet#115384)

7a17f25

Update branding to 8.0.17 (dotnet#115384)

0813075

Merge commit '08130757749ffc920dbe8ac71d6bb822372e5735'

2d9fa7b

Add support for more libicu versions (dotnet#115378)

4a0fef3

Fix line endings (dotnet#115414)

2c39632

Merge commit 'ea5fb7fd53bd73cf1c480d73471a1d050d445e6a'

038ed74

Merge pull request dotnet#115410 from dotnet/merge/release/8.0-to-rel…

f53f226

…ease/8.0-staging [automated] Merge branch 'release/8.0' => 'release/8.0-staging'

Merge commit 'efd5742bb5dd1677fbbbeb277bcfb5c9025548e5' into internal…

bba50d4

…-merge-8.0-2025-05-13-1454

Merge pull request dotnet#115534 from vseanreesermsft/internal-merge-…

a507321

…8.0-2025-05-13-1454 Merging internal commits for release/8.0

Merge commit 'a507321f376ac0e4d64e4820b895b0668b3944c1'

8ee4ad4

Merge pull request dotnet#115498 from jozkee/release/8.0-staging

6aebff6

[manual] Merge release/8.0-staging into release/8.0

Merge commit '6aebff6a34fe10fccab3e809cefce9b060fdfc5c'

a3f4ac1

update macos signing to use pme (dotnet#115633)

4e873a1

Co-authored-by: Oleksandr.Didyk <odidyk@microsoft.com>

Merge commit '4e873a1af5537735e59e7f8cc7368ea26db0cd45'

77545d6

throw an exception instead of infinite loop (dotnet#115528)

99dbb90

Co-authored-by: Maoni0 <maoni@microsoft.com>

akoeplinger and others added 15 commits December 4, 2025 15:30

Bump MicrosoftDotnetSdkInternalVersion

fe112b9

[release/8.0-staging] Add NuGet package dependencies (dotnet#121996)

0dec53a

Related to dotnet/source-build#5427

[release/8.0] Backport improvements to Http and Ssl stress tests (dot…

ff97795

…net#122141)

[release/8.0-staging] Use explicit versions for MSBuild properties (d…

2064f12

…otnet#122502)

pavelsavara added this to the 11.0.0 milestone Jan 22, 2026

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pavelsavara added the area-System.Threading label Jan 22, 2026

pavelsavara mentioned this pull request Jan 22, 2026

[browser][ST] IsSingleThreaded and ThrowIfSingleThreaded #123329

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pavelsavara force-pushed the rename_IsThreadingSupported branch from cfaf714 to be56e6f Compare January 23, 2026 11:37

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[tests] rename PlatformDetection.IsThreadingSupported -> PlatformDetection.IsNotSingleThreaded #123497

[tests] rename PlatformDetection.IsThreadingSupported -> PlatformDetection.IsNotSingleThreaded #123497

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[tests] rename PlatformDetection.IsThreadingSupported -> PlatformDetection.IsNotSingleThreaded #123497

[tests] rename PlatformDetection.IsThreadingSupported -> PlatformDetection.IsNotSingleThreaded #123497

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akoeplinger commented Jan 22, 2026 •

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