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fixes for 1.41 grpc semantic conventions #4

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fixes for 1.41 grpc semantic conventions #4

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cb13e5f
fixup! [gRPC] Remove rpc.service and update rpc.method
Jun 12, 2026
43c8f20
[gRPC] Use string representation of status code in rpc.response.statu…
Jun 12, 2026
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9 changes: 4 additions & 5 deletions src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInListener.cs
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Expand Up @@ -391,7 +391,7 @@ private static void AddGrpcAttributes(Activity activity, string grpcMethod, Http
// https://github.com/open-telemetry/semantic-conventions/blob/main/docs/rpc/rpc-spans.md#span-name
activity.DisplayName = details.DisplayName;

activity.SetTag(SemanticConventions.AttributeRpcSystem, GrpcTagHelper.RpcSystemGrpc);
activity.SetTag(SemanticConventions.AttributeRpcSystemName, GrpcTagHelper.RpcSystemGrpc);

// see the spec https://github.com/open-telemetry/semantic-conventions/blob/v1.23.0/docs/rpc/rpc-spans.md

Expand All @@ -409,8 +409,7 @@ private static void AddGrpcAttributes(Activity activity, string grpcMethod, Http

if (details.IsParsed)
{
activity.SetTag(SemanticConventions.AttributeRpcService, details.RpcService);
activity.SetTag(SemanticConventions.AttributeRpcMethod, details.RpcMethod);
activity.SetTag(SemanticConventions.AttributeRpcMethod, details.DisplayName);

// Remove the grpc.method tag added by the gRPC .NET library
activity.SetTag(GrpcTagHelper.GrpcMethodTagName, null);
Expand All @@ -420,8 +419,8 @@ private static void AddGrpcAttributes(Activity activity, string grpcMethod, Http

if (validStatusCode)
{
// setting rpc.grpc.status_code
activity.SetTag(SemanticConventions.AttributeRpcGrpcStatusCode, grpcStatusCode);
// setting rpc.response.status_code
activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, GrpcTagHelper.ConvertStatusCodeToString(grpcStatusCode));
}
}
}
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3 changes: 3 additions & 0 deletions src/OpenTelemetry.Instrumentation.GrpcCore/OpenTelemetry.Instrumentation.GrpcCore.csproj
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Expand Up @@ -24,9 +24,12 @@
</ItemGroup>

<ItemGroup>
<Compile Include="$(RepoRoot)\src\Shared\ActivityHelperExtensions.cs" Link="Includes\ActivityHelperExtensions.cs" />
<Compile Include="$(RepoRoot)\src\Shared\ActivitySourceFactory.cs" Link="Includes\ActivitySourceFactory.cs" />
<Compile Include="$(RepoRoot)\src\Shared\AssemblyVersionExtensions.cs" Link="Includes\AssemblyVersionExtensions.cs" />
<Compile Include="$(RepoRoot)\src\Shared\Guard.cs" Link="Includes\Guard.cs" />
<Compile Include="$(RepoRoot)\src\Shared\GrpcStatusCanonicalCode.cs" Link="Includes\GrpcStatusCanonicalCode.cs" />
<Compile Include="$(RepoRoot)\src\Shared\GrpcTagHelper.cs" Link="Includes\GrpcTagHelper.cs" />
<Compile Include="$(RepoRoot)\src\Shared\SemanticConventions.cs" Link="Includes\SemanticConventions.cs" />
</ItemGroup>

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2 changes: 1 addition & 1 deletion src/OpenTelemetry.Instrumentation.GrpcCore/RpcScope.cs
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Expand Up @@ -216,7 +216,7 @@ private void StopActivity(int statusCode, bool markAsCompleted = true)
return;
}

this.activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, statusCode);
this.activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, GrpcTagHelper.ConvertStatusCodeToString(statusCode));
this.activity.Stop();
}

Expand Down
2 changes: 1 addition & 1 deletion ...penTelemetry.Instrumentation.GrpcNetClient/Implementation/GrpcClientDiagnosticListener.cs
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Expand Up @@ -176,7 +176,7 @@ public void OnStopActivity(Activity activity, object? payload)
activity.SetStatus(GrpcTagHelper.ResolveSpanStatusForGrpcStatusCodeOnClient(status));
}

activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, status);
activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, GrpcTagHelper.ConvertStatusCodeToString(status));
}

// Remove the grpc.status_code tag added by the gRPC .NET library
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25 changes: 25 additions & 0 deletions src/Shared/GrpcTagHelper.cs
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Expand Up @@ -27,6 +27,31 @@ public static bool TryGetGrpcStatusCodeFromActivity(Activity activity, out int s
int.TryParse(grpcStatusCodeTag as string, NumberStyles.None, CultureInfo.InvariantCulture, out statusCode);
}

public static string ConvertStatusCodeToString(int statusCode)
{
return (GrpcStatusCanonicalCode)statusCode switch
{
GrpcStatusCanonicalCode.Ok => "OK",
GrpcStatusCanonicalCode.Cancelled => "CANCELLED",
GrpcStatusCanonicalCode.Unknown => "UNKNOWN",
GrpcStatusCanonicalCode.InvalidArgument => "INVALID_ARGUMENT",
GrpcStatusCanonicalCode.DeadlineExceeded => "DEADLINE_EXCEEDED",
GrpcStatusCanonicalCode.NotFound => "NOT_FOUND",
GrpcStatusCanonicalCode.AlreadyExists => "ALREADY_EXISTS",
GrpcStatusCanonicalCode.PermissionDenied => "PERMISSION_DENIED",
GrpcStatusCanonicalCode.ResourceExhausted => "RESOURCE_EXHAUSTED",
GrpcStatusCanonicalCode.FailedPrecondition => "FAILED_PRECONDITION",
GrpcStatusCanonicalCode.Aborted => "ABORTED",
GrpcStatusCanonicalCode.OutOfRange => "OUT_OF_RANGE",
GrpcStatusCanonicalCode.Unimplemented => "UNIMPLEMENTED",
GrpcStatusCanonicalCode.Internal => "INTERNAL",
GrpcStatusCanonicalCode.Unavailable => "UNAVAILABLE",
GrpcStatusCanonicalCode.DataLoss => "DATA_LOSS",
GrpcStatusCanonicalCode.Unauthenticated => "UNAUTHENTICATED",
_ => "UNKNOWN",
};
}

public static bool TryParseRpcServiceAndRpcMethod(string grpcMethod, out string rpcService, out string rpcMethod)
{
var span = grpcMethod.AsSpan();
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32 changes: 29 additions & 3 deletions test/OpenTelemetry.Contrib.Shared.Tests/GrpcTagHelperTests.cs
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Expand Up @@ -45,10 +45,10 @@ public void GrpcTagHelper_GetGrpcStatusCodeFromActivity()
Assert.True(validConversion);

var statusCode = GrpcTagHelper.ResolveSpanStatusForGrpcStatusCodeOnClient(status);
activity.SetTag(SemanticConventions.AttributeRpcGrpcStatusCode, status);
activity.SetTag(SemanticConventions.AttributeRpcResponseStatusCode, GrpcTagHelper.ConvertStatusCodeToString(status));

Assert.Equal(ActivityStatusCode.Unset, statusCode);
Assert.Equal(status, activity.GetTagValue(SemanticConventions.AttributeRpcGrpcStatusCode));
Assert.Equal(GrpcTagHelper.ConvertStatusCodeToString(status), activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
}

[Theory]
Expand Down Expand Up @@ -103,6 +103,32 @@ public void GrpcTagHelper_ResolveSpanStatusForGrpcStatusCodeOnServer(int grpcSta
Assert.Equal(expectedActivityStatusCode, result);
}

[Theory]
[InlineData(0, "OK")] // Ok
[InlineData(-1, "UNKNOWN")] // Invalid negative status code
[InlineData(1, "CANCELLED")] // Cancelled
[InlineData(2, "UNKNOWN")] // Unknown
[InlineData(3, "INVALID_ARGUMENT")] // InvalidArgument
[InlineData(4, "DEADLINE_EXCEEDED")] // DeadlineExceeded
[InlineData(5, "NOT_FOUND")] // NotFound
[InlineData(6, "ALREADY_EXISTS")] // AlreadyExists
[InlineData(7, "PERMISSION_DENIED")] // PermissionDenied
[InlineData(8, "RESOURCE_EXHAUSTED")] // ResourceExhausted
[InlineData(9, "FAILED_PRECONDITION")] // FailedPrecondition
[InlineData(10, "ABORTED")] // Aborted
[InlineData(11, "OUT_OF_RANGE")] // OutOfRange
[InlineData(12, "UNIMPLEMENTED")] // Unimplemented
[InlineData(13, "INTERNAL")] // Internal
[InlineData(14, "UNAVAILABLE")] // Unavailable
[InlineData(15, "DATA_LOSS")] // DataLoss
[InlineData(16, "UNAUTHENTICATED")] // Unauthenticated
[InlineData(99, "UNKNOWN")] // Unknown status code
public void GrpcTagHelper_ConvertStatusCodeToString(int grpcStatusCode, string expectedStatusCode)
{
var result = GrpcTagHelper.ConvertStatusCodeToString(grpcStatusCode);
Assert.Equal(expectedStatusCode, result);
}

[Fact]
public void GrpcTagHelper_GetGrpcStatusCodeFromEmptyActivity()
{
Expand All @@ -111,6 +137,6 @@ public void GrpcTagHelper_GetGrpcStatusCodeFromEmptyActivity()
var validConversion = GrpcTagHelper.TryGetGrpcStatusCodeFromActivity(activity, out var status);
Assert.False(validConversion);
Assert.Equal(-1, status);
Assert.Null(activity.GetTagValue(SemanticConventions.AttributeRpcGrpcStatusCode));
Assert.Null(activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
}
}
16 changes: 8 additions & 8 deletions test/OpenTelemetry.Instrumentation.AspNetCore.Tests/GrpcTests.cs
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Expand Up @@ -31,10 +31,10 @@ public void OnStopActivityAddsGrpcAttributesForParsedMethodAndValidStatusCode()
AssertTag(activity, SemanticConventions.AttributeClientAddress, "127.0.0.1");
AssertTag(activity, SemanticConventions.AttributeClientPort, 4317);
AssertTag(activity, SemanticConventions.AttributeHttpResponseStatusCode, 200);
AssertTag(activity, SemanticConventions.AttributeRpcGrpcStatusCode, 13);
AssertTag(activity, SemanticConventions.AttributeRpcMethod, "Method");
AssertTag(activity, SemanticConventions.AttributeRpcService, "package.Service");
AssertTag(activity, SemanticConventions.AttributeRpcSystem, "grpc");
AssertTag(activity, SemanticConventions.AttributeRpcResponseStatusCode, "INTERNAL");
AssertTag(activity, SemanticConventions.AttributeRpcMethod, "package.Service/Method");
AssertTag(activity, SemanticConventions.AttributeRpcService, null);
AssertTag(activity, SemanticConventions.AttributeRpcSystemName, "grpc");
}

[Fact]
Expand All @@ -56,10 +56,10 @@ public void OnStopActivityPreservesGrpcTagsWhenMethodCannotBeParsedAndStatusIsIn
AssertTag(activity, GrpcTagHelper.GrpcStatusCodeTagName, "invalid");
AssertTag(activity, SemanticConventions.AttributeClientAddress, null);
AssertTag(activity, SemanticConventions.AttributeClientPort, 4317);
AssertTag(activity, SemanticConventions.AttributeRpcGrpcStatusCode, null);
AssertTag(activity, SemanticConventions.AttributeRpcResponseStatusCode, null);
AssertTag(activity, SemanticConventions.AttributeRpcMethod, null);
AssertTag(activity, SemanticConventions.AttributeRpcService, null);
AssertTag(activity, SemanticConventions.AttributeRpcSystem, "grpc");
AssertTag(activity, SemanticConventions.AttributeRpcSystemName, "grpc");
}

[Fact]
Expand All @@ -79,8 +79,8 @@ public void OnStopActivityIgnoresEmptyGrpcMethodTag()

AssertTag(activity, GrpcTagHelper.GrpcMethodTagName, string.Empty);
AssertTag(activity, GrpcTagHelper.GrpcStatusCodeTagName, "13");
AssertTag(activity, SemanticConventions.AttributeRpcGrpcStatusCode, null);
AssertTag(activity, SemanticConventions.AttributeRpcSystem, null);
AssertTag(activity, SemanticConventions.AttributeRpcResponseStatusCode, null);
AssertTag(activity, SemanticConventions.AttributeRpcSystemName, null);
}

private static void AssertTag(Activity activity, string name, object? expected) =>
Expand Down
3 changes: 2 additions & 1 deletion test/OpenTelemetry.Instrumentation.GrpcCore.Tests/GrpcCoreClientInterceptorTests.cs
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Expand Up @@ -344,6 +344,7 @@ internal static void ValidateCommonActivityTags(
Assert.True(activity.IsStopped, "The activity has not been stopped.");

var expectedRpcMethod = $"OpenTelemetry.Instrumentation.GrpcCore.Tests.Foobar/{expectedMethodName}";
var expectedResponseStatusCode = GrpcTagHelper.ConvertStatusCodeToString((int)expectedStatusCode);

Assert.Equal(expectedRpcMethod, activity.DisplayName);

Expand All @@ -352,7 +353,7 @@ internal static void ValidateCommonActivityTags(
Assert.Contains(activity.TagObjects, t => t.Key == SemanticConventions.AttributeRpcSystemName && (string?)t.Value == "grpc");
Assert.DoesNotContain(activity.TagObjects, t => t.Key == SemanticConventions.AttributeRpcService);
Assert.Contains(activity.TagObjects, t => t.Key == SemanticConventions.AttributeRpcMethod && (string?)t.Value == expectedRpcMethod);
Assert.Contains(activity.TagObjects, t => t.Key == SemanticConventions.AttributeRpcResponseStatusCode && (int?)t.Value == (int)expectedStatusCode);
Assert.Contains(activity.TagObjects, t => t.Key == SemanticConventions.AttributeRpcResponseStatusCode && (string?)t.Value == expectedResponseStatusCode);

// Cancelled is not an error.
if (expectedStatusCode is not StatusCode.OK and not StatusCode.Cancelled)
Expand Down
14 changes: 7 additions & 7 deletions test/OpenTelemetry.Instrumentation.GrpcNetClient.Tests/GrpcTests.client.cs
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Expand Up @@ -90,7 +90,7 @@ public void GrpcClientCallsAreCollectedSuccessfully(string baseAddress, bool sho
// Tags added by the library then removed from the instrumentation
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcMethodTagName));
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcStatusCodeTagName));
Assert.Equal(0, activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));

if (shouldEnrich)
{
Expand Down Expand Up @@ -146,7 +146,7 @@ public void GrpcAndHttpClientInstrumentationIsInvoked(bool shouldEnrich)

ValidateGrpcActivity(grpcSpan);
Assert.Equal($"greet.Greeter/SayHello", grpcSpan.DisplayName);
Assert.Equal(0, grpcSpan.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", grpcSpan.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("POST", httpSpan.DisplayName);
Assert.Equal(grpcSpan.SpanId, httpSpan.ParentSpanId);

Expand Down Expand Up @@ -199,19 +199,19 @@ public void GrpcAndHttpClientInstrumentationWithSuppressInstrumentation()

ValidateGrpcActivity(grpcSpan1);
Assert.Equal($"greet.Greeter/SayHello", grpcSpan1.DisplayName);
Assert.Equal(0, grpcSpan1.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", grpcSpan1.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));

ValidateGrpcActivity(grpcSpan2);
Assert.Equal($"greet.Greeter/SayHello", grpcSpan2.DisplayName);
Assert.Equal(0, grpcSpan2.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", grpcSpan2.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));

ValidateGrpcActivity(grpcSpan3);
Assert.Equal($"greet.Greeter/SayHello", grpcSpan3.DisplayName);
Assert.Equal(0, grpcSpan3.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", grpcSpan3.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));

ValidateGrpcActivity(grpcSpan4);
Assert.Equal($"greet.Greeter/SayHello", grpcSpan4.DisplayName);
Assert.Equal(0, grpcSpan4.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", grpcSpan4.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
}

#if NET
Expand Down Expand Up @@ -267,7 +267,7 @@ public void GrpcPropagatesContextWithSuppressInstrumentationOptionSetToTrue()
Assert.Equal($"POST /greet.Greeter/SayHello", serverActivity.DisplayName);
Assert.Equal(clientActivity.TraceId, serverActivity.TraceId);
Assert.Equal(clientActivity.SpanId, serverActivity.ParentSpanId);
Assert.Equal(0, clientActivity.GetTagValue(SemanticConventions.AttributeRpcGrpcStatusCode));
Assert.Equal("OK", clientActivity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("customValue", serverActivity.GetCustomProperty("customField") as string);
}
finally
Expand Down
20 changes: 12 additions & 8 deletions test/OpenTelemetry.Instrumentation.GrpcNetClient.Tests/GrpcTests.server.cs
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Expand Up @@ -76,17 +76,19 @@ public void GrpcAspNetCoreInstrumentationAddsCorrectAttributes(string? enableGrp

if (enableGrpcAspNetCoreSupport != null && enableGrpcAspNetCoreSupport.Equals("true", StringComparison.OrdinalIgnoreCase))
{
Assert.Equal("grpc", activity.GetTagValue(SemanticConventions.AttributeRpcSystem));
Assert.Equal("greet.Greeter", activity.GetTagValue(SemanticConventions.AttributeRpcService));
Assert.Equal("SayHello", activity.GetTagValue(SemanticConventions.AttributeRpcMethod));
Assert.Equal("greet.Greeter/SayHello", activity.DisplayName);
Assert.Equal("grpc", activity.GetTagValue(SemanticConventions.AttributeRpcSystemName));
Assert.Null(activity.GetTagValue(SemanticConventions.AttributeRpcService));
Assert.Equal("greet.Greeter/SayHello", activity.GetTagValue(SemanticConventions.AttributeRpcMethod));
Assert.Contains(activity.GetTagValue(SemanticConventions.AttributeClientAddress), clientLoopbackAddresses);
Assert.NotEqual(0, activity.GetTagValue(SemanticConventions.AttributeClientPort));
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcMethodTagName));
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcStatusCodeTagName));
Assert.Equal(0, activity.GetTagValue(SemanticConventions.AttributeRpcGrpcStatusCode));
Assert.Equal("OK", activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
}
else
{
Assert.Equal("POST /greet.Greeter/SayHello", activity.DisplayName);
Assert.NotNull(activity.GetTagValue(GrpcTagHelper.GrpcMethodTagName));
Assert.NotNull(activity.GetTagValue(GrpcTagHelper.GrpcStatusCodeTagName));
}
Expand Down Expand Up @@ -154,17 +156,19 @@ public void GrpcAspNetCoreInstrumentationAddsCorrectAttributesWhenItCreatesNewAc

if (enableGrpcAspNetCoreSupport != null && enableGrpcAspNetCoreSupport.Equals("true", StringComparison.OrdinalIgnoreCase))
{
Assert.Equal("greet.Greeter/SayHello", activity.DisplayName);
Assert.Equal("grpc", activity.GetTagValue(SemanticConventions.AttributeRpcSystemName));
Assert.Equal("greet.Greeter", activity.GetTagValue(SemanticConventions.AttributeRpcService));
Assert.Equal("SayHello", activity.GetTagValue(SemanticConventions.AttributeRpcMethod));
Assert.Null(activity.GetTagValue(SemanticConventions.AttributeRpcService));
Assert.Equal("greet.Greeter/SayHello", activity.GetTagValue(SemanticConventions.AttributeRpcMethod));
Assert.Contains(activity.GetTagValue(SemanticConventions.AttributeNetPeerIp), clientLoopbackAddresses);
Assert.NotEqual(0, activity.GetTagValue(SemanticConventions.AttributeNetPeerPort));
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcMethodTagName));
Assert.Null(activity.GetTagValue(GrpcTagHelper.GrpcStatusCodeTagName));
Assert.Equal(0, activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
Assert.Equal("OK", activity.GetTagValue(SemanticConventions.AttributeRpcResponseStatusCode));
}
else
{
{
Assert.Equal("POST /greet.Greeter/SayHello", activity.DisplayName);
Assert.NotNull(activity.GetTagValue(GrpcTagHelper.GrpcMethodTagName));
Assert.NotNull(activity.GetTagValue(GrpcTagHelper.GrpcStatusCodeTagName));
}
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2 changes: 1 addition & 1 deletion ...trumentation.GrpcNetClient.Tests/OpenTelemetry.Instrumentation.GrpcNetClient.Tests.csproj
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Expand Up @@ -18,7 +18,6 @@
<PackageReference Include="OpenTelemetry.Api" />
<PackageReference Include="OpenTelemetry.Exporter.InMemory" />
<PackageReference Include="OpenTelemetry.Extensions.Propagators" />
<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Condition="'$([MSBuild]::GetTargetFrameworkIdentifier(`$(TargetFramework)`))' == '.NETCoreApp'" />
<PackageReference Include="OpenTelemetry.Instrumentation.Http" />
</ItemGroup>

Expand All @@ -28,6 +27,7 @@

<ItemGroup>
<ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.GrpcNetClient\OpenTelemetry.Instrumentation.GrpcNetClient.csproj" />
<ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.AspNetCore\OpenTelemetry.Instrumentation.AspNetCore.csproj" Condition="'$([MSBuild]::GetTargetFrameworkIdentifier(`$(TargetFramework)`))' == '.NETCoreApp'" />
</ItemGroup>

<ItemGroup>
Expand Down