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[Infra] Support .NET 11#6899

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martincostello wants to merge 87 commits into
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[Infra] Support .NET 11#6899
martincostello wants to merge 87 commits into
open-telemetry:mainfrom
martincostello:dotnet-vnext

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@martincostello

@martincostello martincostello commented Feb 15, 2026

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The intention is to keep this PR updated over the course of .NET 11's development as new previews are released.

Changes

Add support for building and testing with .NET 11.

  • Build with .NET 11 SDK
  • Add net11.0 target
  • Drop net8.0 and net9.0 targets

TODO

  • Use stable (or RC) SDK and NuGet package versions
  • Use fully-qualified container image tags (i.e. not 11.0-preview)
  • Remove workarounds for .NET 11 preview issues

Merge requirement checklist

  • CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
  • Unit tests added/updated
  • Appropriate CHANGELOG.md files updated for non-trivial changes
  • Changes in public API reviewed (if applicable)

@github-actions github-actions Bot added infra Infra work - CI/CD, code coverage, linters dependencies Pull requests that update a dependency file documentation Documentation related pkg:OpenTelemetry.Exporter.OpenTelemetryProtocol Issues related to OpenTelemetry.Exporter.OpenTelemetryProtocol NuGet package pkg:OpenTelemetry.Exporter.Zipkin Issues related to OpenTelemetry.Exporter.Zipkin NuGet package pkg:OpenTelemetry.Extensions.Hosting Issues related to OpenTelemetry.Extensions.Hosting NuGet package pkg:OpenTelemetry Issues related to OpenTelemetry NuGet package pkg:OpenTelemetry.Exporter.Prometheus.AspNetCore Issues related to OpenTelemetry.Exporter.Prometheus.AspNetCore NuGet package pkg:OpenTelemetry.Exporter.Prometheus.HttpListener Issues related to OpenTelemetry.Exporter.Prometheus.HttpListener NuGet package labels Feb 15, 2026
martincostello
martincostello commented Feb 15, 2026
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Comment thread src/OpenTelemetry.Exporter.Prometheus.HttpListener/PrometheusHttpListener.cs Outdated
@codecov

codecov Bot commented Feb 15, 2026 •
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Codecov Report

❌ Patch coverage is 86.11111% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.20%. Comparing base (867c749) to head (d73584a).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines Patch % Lines
...penTelemetryProtocol/PersistentStorage/FileBlob.cs 0.00% 5 Missing ⚠️
Additional details and impacted files

Impacted file tree graph

@@            Coverage Diff             @@
##             main    #6899      +/-   ##
==========================================
- Coverage   90.21%   90.20%   -0.02%     
==========================================
  Files         290      290              
  Lines       15967    15982      +15     
==========================================
+ Hits        14405    14416      +11     
- Misses       1562     1566       +4
Flag Coverage Δ
unittests-PowerShellScripts 87.43% <ø> (ø)
unittests-Project-Experimental 90.16% <86.11%> (-0.15%) ⬇️
unittests-Project-Stable 90.05% <86.11%> (-0.24%) ⬇️
unittests-Solution 90.24% <86.11%> (+<0.01%) ⬆️
unittests-UnstableCoreLibraries-Experimental 51.10% <50.00%> (+<0.01%) ⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines Coverage Δ
...nTelemetry.Api/Context/Propagation/B3Propagator.cs 89.83% <100.00%> (ø)
...metry.Api/Context/Propagation/BaggagePropagator.cs 93.78% <100.00%> (ø)
....Api/Context/Propagation/TraceContextPropagator.cs 90.49% <100.00%> (ø)
...c/OpenTelemetry.Api/Logs/LogRecordAttributeList.cs 74.78% <100.00%> (ø)
...yProtocol/Implementation/OtlpCertificateManager.cs 76.47% <ø> (-0.18%) ⬇️
...TelemetryProtocol/OtlpExporterOptionsExtensions.cs 99.10% <100.00%> (+<0.01%) ⬆️
...tocol/PersistentStorage/PersistentStorageHelper.cs 48.86% <100.00%> (+5.82%) ⬆️
.../PrometheusExporterApplicationBuilderExtensions.cs 100.00% <100.00%> (ø)
...rometheusExporterEndpointRouteBuilderExtensions.cs 100.00% <100.00%> (ø)
...ner/Internal/Shared/PrometheusCollectionManager.cs 90.68% <100.00%> (ø)
... and 7 more

... and 2 files with indirect coverage changes

@github-actions github-actions Bot added pkg:OpenTelemetry.Api Issues related to OpenTelemetry.Api NuGet package pkg:OpenTelemetry.Exporter.Console Issues related to OpenTelemetry.Exporter.Console NuGet package labels Feb 15, 2026
martincostello added a commit to martincostello/opentelemetry-dotnet that referenced this pull request Feb 15, 2026
@martincostello
[Docs] Update TFMs and versions
2e02566 
Update some references to .NET 8 to .NET 10 that were flushed out while working on open-telemetry#6899.
@martincostello martincostello mentioned this pull request Feb 15, 2026
Merged
4 tasks
@Kielek Kielek added the keep-open Prevents issues and pull requests being closed as stale label Feb 16, 2026
@martincostello
Support .NET 11
9cd222b 
- Add support for building and testing with .NET 11, initially using .NET 11 preview 1.
- Add `net11.0` TFMs.
- Drop `net8.0` and `net9.0` TFMs.
- Add workarounds for some issues pending their fixes.
@martincostello
Bump System.Diagnostics.DiagnosticSource
44b57c4 
Update System.Diagnostics.DiagnosticSource to 11.0.* that was missed in the previous commit and fix some missed analyzer warnings.
@martincostello
Fix path check
52ccdd6 
Copy-paste mistake.
@martincostello
Fix NU1510 warning
4fc224a 
Fix `NU1510` warning caused by workaround for aspnetcore issue.
@martincostello
Update CompatibilitySuppressions
7ed07ef 
Update CompatibilitySuppressions for .NET 11.
@martincostello
Add EOL
f361c14 
Add missing final new line.
@martincostello

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@martincostello

martincostello commented Mar 12, 2026

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Commit that should fix all the warnings just pushed. Will make a version targeting main tomorrow that doesn't contain C#-15-specific features (like [with(...)])- those specific changes can be reviewed and refined there (and potentially later broken up into smaller PRs by project).

@github-actions github-actions Bot added the pkg:OpenTelemetry.Exporter.InMemory Issues related to OpenTelemetry.Exporter.InMemory NuGet package label Mar 12, 2026
@martincostello
Merge branch 'main' into dotnet-vnext
4769103
@martincostello
[Infra] Fix build
8aba1d7 
Populate switch statement to fix new analyser warning.
@martincostello
[Infra] Suppress IDE0066
947f45e 
Suppress IDE0066 as otherwise it makes the code hard to read.
@martincostello
Merge branch 'main' into dotnet-vnext
f3bbaf7
@martincostello
[Infra] Fix new code analysis warnings
aa27d46 
Use pattern matching.
@martincostello martincostello mentioned this pull request Jun 23, 2026
Open
martincostello
martincostello commented Jun 24, 2026
View reviewed changes
Comment thread Directory.Packages.props Outdated
@martincostello
[Infra] Add missing override
df2f68e 
Add missing override for newly added package.
@martincostello martincostello mentioned this pull request Jun 24, 2026
Open
@github-actions github-actions Bot added the pkg:OpenTelemetry.Shims.OpenTracing Issues related to OpenTelemetry.Shims.OpenTracing NuGet package label Jul 3, 2026
@github-actions github-actions Bot removed the pkg:OpenTelemetry.Shims.OpenTracing Issues related to OpenTelemetry.Shims.OpenTracing NuGet package label Jul 3, 2026
martincostello added a commit to martincostello/opentelemetry-dotnet that referenced this pull request Jul 10, 2026
@martincostello
[Exporter.Prometheus] Use compound assignment
2c3edeb 
Cherry-pick change from open-telemetry#6899 to fix new code analysis warning in .NET 11.
@martincostello martincostello changed the title Support .NET 11 [Infra] Support .NET 11 Jul 10, 2026
@opentelemetry-pr-dashboard opentelemetry-pr-dashboard Bot mentioned this pull request Jul 17, 2026
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opentelemetry-pr-dashboard Bot commented Jul 18, 2026

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Pull request dashboard status

  • Waiting on: Author
  • Next step: Move out of draft to request review.

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dependencies Pull requests that update a dependency file documentation Documentation related infra Infra work - CI/CD, code coverage, linters keep-open Prevents issues and pull requests being closed as stale perf Performance related pkg:OpenTelemetry.Api Issues related to OpenTelemetry.Api NuGet package pkg:OpenTelemetry.Exporter.Console Issues related to OpenTelemetry.Exporter.Console NuGet package pkg:OpenTelemetry.Exporter.OpenTelemetryProtocol Issues related to OpenTelemetry.Exporter.OpenTelemetryProtocol NuGet package pkg:OpenTelemetry.Exporter.Prometheus.AspNetCore Issues related to OpenTelemetry.Exporter.Prometheus.AspNetCore NuGet package pkg:OpenTelemetry.Exporter.Prometheus.HttpListener Issues related to OpenTelemetry.Exporter.Prometheus.HttpListener NuGet package pkg:OpenTelemetry.Exporter.Zipkin Issues related to OpenTelemetry.Exporter.Zipkin NuGet package pkg:OpenTelemetry.Extensions.Hosting Issues related to OpenTelemetry.Extensions.Hosting NuGet package pkg:OpenTelemetry.Extensions.Propagators Issues related to OpenTelemetry.Extensions.Propagators NuGet package pkg:OpenTelemetry Issues related to OpenTelemetry NuGet package

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v1.XY.0 (.NET 11 release tracking)

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@martincostello @Kielek