[WIP] Support .NET 10

[martincostello]

Changes

Add support for building and testing with .NET 10.

Initially using .NET 10 preview 4, will update as previews progress.

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)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.00%. Comparing base (e758269) to head (20cd570).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2822      +/-   ##
==========================================
- Coverage   70.04%   70.00%   -0.05%     
==========================================
  Files         429      439      +10     
  Lines       16838    16890      +52     
==========================================
+ Hits        11794    11823      +29     
- Misses       5044     5067      +23     

Flag	Coverage Δ
unittests-Contrib.Shared.Tests	83.73% <ø> (ø)
unittests-Exporter.Geneva	53.47% <ø> (+0.13%)	⬆️
unittests-Exporter.InfluxDB	95.14% <ø> (ø)
unittests-Exporter.Instana	74.86% <ø> (ø)
unittests-Exporter.OneCollector	94.61% <ø> (ø)
unittests-Extensions	90.65% <ø> (ø)
unittests-Extensions.Enrichment	100.00% <ø> (ø)
unittests-Extensions.Enrichment.AspNetCore	94.11% <ø> (ø)
unittests-Extensions.Enrichment.Http	94.33% <ø> (ø)
unittests-Instrumentation.AWS	83.80% <ø> (ø)
unittests-Instrumentation.AspNet	75.18% <ø> (+0.24%)	⬆️
unittests-Instrumentation.AspNetCore	71.69% <ø> (+0.92%)	⬆️
unittests-Instrumentation.Cassandra	23.52% <ø> (?)
unittests-Instrumentation.ConfluentKafka	14.10% <ø> (ø)
unittests-Instrumentation.ElasticsearchClient	80.12% <ø> (ø)
unittests-Instrumentation.EntityFrameworkCore	80.80% <ø> (ø)
unittests-Instrumentation.EventCounters	76.36% <ø> (ø)
unittests-Instrumentation.GrpcCore	91.42% <ø> (ø)
unittests-Instrumentation.GrpcNetClient	79.61% <ø> (ø)
unittests-Instrumentation.Hangfire	84.61% <ø> (ø)
unittests-Instrumentation.Http	74.22% <100.00%> (+0.03%)	⬆️
unittests-Instrumentation.Owin	88.62% <ø> (ø)
unittests-Instrumentation.Process	100.00% <ø> (ø)
unittests-Instrumentation.Quartz	78.76% <ø> (ø)
unittests-Instrumentation.Runtime	100.00% <ø> (ø)
unittests-Instrumentation.ServiceFabricRemoting	34.54% <ø> (ø)
unittests-Instrumentation.SqlClient	87.29% <ø> (ø)
unittests-Instrumentation.StackExchangeRedis	71.80% <ø> (ø)
unittests-Instrumentation.Wcf	78.95% <ø> (+0.13%)	⬆️
unittests-OpAmp.Client	71.89% <ø> (+0.59%)	⬆️
unittests-PersistentStorage	65.88% <ø> (ø)
unittests-Resources.AWS	74.42% <ø> (ø)
unittests-Resources.Azure	85.31% <ø> (ø)
unittests-Resources.Container	67.34% <ø> (ø)
unittests-Resources.Gcp	71.42% <ø> (ø)
unittests-Resources.Host	73.91% <ø> (ø)
unittests-Resources.OperatingSystem	76.98% <ø> (ø)
unittests-Resources.Process	100.00% <ø> (ø)
unittests-Resources.ProcessRuntime	79.59% <ø> (ø)
unittests-Sampler.AWS	88.25% <ø> (ø)

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

Files with missing lines	Coverage Δ
...tp/Implementation/HttpHandlerDiagnosticListener.cs	73.17% <100.00%> (+0.21%)	⬆️

... and 16 files with indirect coverage changes

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[martincostello]

Need to investigate macOS test failure with .NET 10. I don't have a Macbook so might be tricky:

[xUnit.net 00:00:00.10]   Finished:    OpenTelemetry.Resources.OperatingSystem.Tests
  Failed OpenTelemetry.Resources.OperatingSystem.Test.OperatingSystemDetectorTests.TestOperatingSystemAttributes [7 ms]
  Error Message:
Test Run Failed.
   Assert.Contains() Failure: Sub-string not found
String:    "macOS 14.7.6"
Not found: "Darwin"
  Stack Trace:
     at OpenTelemetry.Resources.OperatingSystem.Test.OperatingSystemDetectorTests.TestOperatingSystemAttributes() in /Users/runner/work/opentelemetry-dotnet-contrib/opentelemetry-dotnet-contrib/test/OpenTelemetry.Resources.OperatingSystem.Tests/OperatingSystemDetectorTests.cs:line 49
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

[martincostello]

Need to investigate macOS test failure with .NET 10

Due to changes in dotnet/runtime#113041.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[joegoldman2]

@martincostello with dotnet/runtime#116269 and dotnet/runtime#115959 available in .NET 10, the HttpClient native instrumentation now records exceptions. I think you can condition the following lines to apply them only for versions before 10:

opentelemetry-dotnet-contrib/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpHandlerDiagnosticListener.cs

Lines 181 to 202 in fabb87f

	if (requestTaskStatus != TaskStatus.RanToCompletion)
	{
	if (requestTaskStatus == TaskStatus.Canceled)
	{
	if (currentStatusCode == ActivityStatusCode.Unset)
	{
	// Task cancellation won't trigger the OnException so set the span error information here
	// This can be either TaskCanceled or OperationCanceled but there is no way to figure out which one it is,
	// so let's use the most common case as error type
	activity.SetStatus(ActivityStatusCode.Error, "Task Canceled");
	activity.SetTag(SemanticConventions.AttributeErrorType, typeof(TaskCanceledException).FullName);
	}
	}
	else if (requestTaskStatus != TaskStatus.Faulted)
	{
	if (currentStatusCode == ActivityStatusCode.Unset)
	{
	// Faults are handled in OnException and should already have a span.Status of Error w/ Description.
	activity.SetStatus(ActivityStatusCode.Error);
	}
	}
	}

In the same way that some attributes are set only for versions before 9 (because runtime does it from this version):

opentelemetry-dotnet-contrib/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpHandlerDiagnosticListener.cs

Line 140 in fabb87f

if (!IsNet9OrGreater)