[Infra] Support .NET 11

.github/workflows/Component.BuildTest.yml

@@ -24,7 +24,7 @@ on:
         required: false
         type: string
       tfm-list:
-        default: '[ "net462", "net8.0", "net9.0", "net10.0" ]'
+        default: '[ "net462", "net10.0", "net11.0" ]'
         required: false
         type: string
       trigger:
@@ -75,8 +75,7 @@ jobs:
       uses: actions/setup-dotnet@26b0ec14cb23fa6904739307f278c14f94c95bf1 # v5.4.0
       with:
         dotnet-version: |
-          8.0.x
-          9.0.x
+          10.0.x
 
     - name: Setup .NET
       uses: actions/setup-dotnet@26b0ec14cb23fa6904739307f278c14f94c95bf1 # v5.4.0

.github/workflows/ci.yml

@@ -170,7 +170,7 @@ jobs:
     strategy:
       fail-fast: ${{ github.event_name == 'merge_group' }}
       matrix:
-        version: [ net8.0, net9.0, net10.0 ]
+        version: [ net10.0, net11.0 ]
     env:
       FRAMEWORK_VERSION: ${{ matrix.version }}
     steps:
@@ -198,7 +198,7 @@ jobs:
     strategy:
       fail-fast: ${{ github.event_name == 'merge_group' }}
       matrix:
-        version: [ net8.0, net9.0, net10.0 ]
+        version: [ net10.0, net11.0 ]
     steps:
       - name: Checkout code
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
@@ -240,7 +240,7 @@ jobs:
     - name: Run benchmarks
       shell: pwsh
       run: |
-        $runtimes = @("net10.0")
+        $runtimes = @("net11.0")
         if ($IsWindows) {
           $runtimes += "net462"
         }

.github/workflows/concurrency-tests.yml

@@ -24,7 +24,7 @@ jobs:
           - ubuntu-24.04
           # renovate: datasource=github-runners depType=github-runner
           - windows-2025
-        version: [ net8.0, net10.0 ]
+        version: [ net10.0, net11.0 ]
         project: [ OpenTelemetry.Tests, OpenTelemetry.Api.Tests ]
 
     runs-on: ${{ matrix.os }}

.github/workflows/verifyaotcompat.yml

@@ -22,7 +22,7 @@ jobs:
           - ubuntu-24.04
           # renovate: datasource=github-runners depType=github-runner
           - windows-2025
-        version: [ net8.0, net9.0, net10.0 ]
+        version: [ net10.0, net11.0 ]
 
     runs-on: ${{ matrix.os }}
     steps:

AGENTS.md

@@ -29,7 +29,7 @@ dotnet test test/OpenTelemetry.Tests/OpenTelemetry.Tests.csproj --filter "FullyQ
 **Test for a specific TFM** (Windows also supports `net462`):
 
 ```sh
-dotnet test --framework net10.0
+dotnet test --framework net11.0
 ```
 
 **Check code formatting:**

Directory.Packages.props

@@ -12,42 +12,35 @@
   -->
   <ItemGroup>
     <!-- Default to latest versions for all TFMs -->
-    <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[10.0.0,)" />
-    <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[10.0.0,)" />
-    <PackageVersion Include="Microsoft.Extensions.Diagnostics.Abstractions" Version="[10.0.0,)" />
-    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="[10.0.0,)" />
-    <PackageVersion Include="Microsoft.Extensions.Logging.Configuration" Version="[10.0.0,)" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Include="Microsoft.Extensions.Diagnostics.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Include="Microsoft.Extensions.Logging.Configuration" Version="[11.0.0-preview.6.26359.118,)" />
   </ItemGroup>
   <!-- Version overrides for specific netX.0 TFMs -->
-  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-    <PackageVersion Update="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[8.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[8.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Diagnostics.Abstractions" Version="[8.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Hosting.Abstractions" Version="[8.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Logging.Configuration" Version="[8.0.0,)" />
-  </ItemGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
-    <PackageVersion Update="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[9.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[9.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Diagnostics.Abstractions" Version="[9.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Hosting.Abstractions" Version="[9.0.0,)" />
-    <PackageVersion Update="Microsoft.Extensions.Logging.Configuration" Version="[9.0.0,)" />
-  </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
     <PackageVersion Update="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[10.0.0,)" />
     <PackageVersion Update="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[10.0.0,)" />
     <PackageVersion Update="Microsoft.Extensions.Diagnostics.Abstractions" Version="[10.0.0,)" />
     <PackageVersion Update="Microsoft.Extensions.Hosting.Abstractions" Version="[10.0.0,)" />
     <PackageVersion Update="Microsoft.Extensions.Logging.Configuration" Version="[10.0.0,)" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net11.0'">
+    <PackageVersion Update="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Update="Microsoft.Extensions.DependencyInjection.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Update="Microsoft.Extensions.Diagnostics.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Update="Microsoft.Extensions.Hosting.Abstractions" Version="[11.0.0-preview.6.26359.118,)" />
+    <PackageVersion Update="Microsoft.Extensions.Logging.Configuration" Version="[11.0.0-preview.6.26359.118,)" />
+  </ItemGroup>
 
   <!--
       System.Diagnostics.DiagnosticSource is exempted from the requirement to match the major version of
       the runtime so that new APIs and/or semantic conventions are available to all versions of .NET.
       See https://github.com/open-telemetry/opentelemetry-dotnet/issues/5973 for more details.
   -->
   <ItemGroup>
-    <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="[10.0.0,)" />
+    <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="[11.0.0-preview.6.26359.118,)" />
   </ItemGroup>
 
   <!--
@@ -82,10 +75,6 @@
     <PackageVersion Include="System.Text.Encodings.Web" Version="[4.7.2,)" />
     <PackageVersion Include="System.Text.Json" Version="[4.7.2,)" />
 
-    <!-- Mitigate https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43485. -->
-    <!-- Newer NETCoreApp runtimes need to be redirected to safe versions. -->
-    <PackageVersion Update="System.Text.Encodings.Web" Version="[8.0.0,)" Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'" />
-    <PackageVersion Update="System.Text.Json" Version="[8.0.5,)" Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'" />
   </ItemGroup>
 
   <!--
@@ -131,16 +120,12 @@
     <PackageVersion Include="xunit.runner.visualstudio" Version="[2.8.2,)" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-    <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="8.0.29" />
-  </ItemGroup>
-
-  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
-    <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="9.0.18" />
-  </ItemGroup>
-
   <ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="10.0.10" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'net11.0'">
+    <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="11.0.0-preview.6.26359.118" />
+  </ItemGroup>
+
 </Project>

OpenTelemetry.slnx

@@ -36,8 +36,7 @@
     <File Path="build/OpenTelemetry.snk.base64" />
     <File Path="build/docfx.cmd" />
     <File Path="build/docker-compose.net10.0.yml" />
-    <File Path="build/docker-compose.net8.0.yml" />
-    <File Path="build/docker-compose.net9.0.yml" />
+    <File Path="build/docker-compose.net11.0.yml" />
     <File Path="build/GlobalAttrExclusions.txt" />
     <File Path="build/opentelemetry-icon-color.png" />
     <File Path="build/OpenTelemetry.prod.loose.ruleset" />

benchmark.ps1

@@ -29,7 +29,7 @@ The baseline branch, tag, or commit to benchmark for comparison. Defaults to "ma
 The BenchmarkDotNet job to use (e.g. "Short"). Defaults to "Default".
 
 .PARAMETER Runtimes
-One or more target frameworks to benchmark. Defaults to "net10.0".
+One or more target frameworks to benchmark. Defaults to "net11.0".
 
 .PARAMETER EnableMemoryDiagnoser
 Enables the BenchmarkDotNet memory diagnoser.
@@ -46,7 +46,7 @@ Runs only the target benchmark and skips the baseline ref.
 Runs the matching benchmarks for the current branch only.
 
 .EXAMPLE
-./benchmark.ps1 @("*ExporterBenchmarks*") -Target my-feature -Job Short -Runtimes @("net10.0", "net462")
+./benchmark.ps1 @("*ExporterBenchmarks*") -Target my-feature -Job Short -Runtimes @("net11.0", "net462")
 
 Runs the matching exporter benchmarks for the my-feature branch and main using the
 "Short" job for .NET 10 and .NET Framework 4.6.2.
@@ -57,7 +57,7 @@ param(
     [Parameter(Mandatory = $false)][string] $Target,
     [Parameter(Mandatory = $false)][string] $Baseline = "main",
     [Parameter(Mandatory = $false)][string] $Job = "Default",
-    [Parameter(Mandatory = $false)][string[]] $Runtimes = @("net10.0"),
+    [Parameter(Mandatory = $false)][string[]] $Runtimes = @("net11.0"),
     [Parameter(Mandatory = $false)][switch] $EnableMemoryDiagnoser,
     [Parameter(Mandatory = $false)][switch] $EnableEventPipeProfiler,
     [Parameter(Mandatory = $false)][switch] $SkipBaseline
@@ -130,7 +130,7 @@ function ConvertTo-SafePathSegment {
 }
 
 $Configuration = "Release"
-$Framework = "net10.0"
+$Framework = "net11.0"
 
 if (-not ($Runtimes | Where-Object { $_ -notmatch "^net4\d+$" })) {
     $Framework = "net462"

build/Common.nonprod.props

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <DefaultTargetFrameworkForExampleApps>net10.0</DefaultTargetFrameworkForExampleApps>
+    <DefaultTargetFrameworkForExampleApps>net11.0</DefaultTargetFrameworkForExampleApps>
   </PropertyGroup>
 
   <PropertyGroup Condition="$(MSBuildProjectName.EndsWith('.Tests')) OR $(MSBuildProjectName.EndsWith('.FuzzTests'))">

build/Common.props

@@ -1,6 +1,7 @@
 <Project>
   <PropertyGroup>
-    <LangVersion>latest</LangVersion>
+    <!-- TODO Restore to latest once .NET 11 is stable -->
+    <LangVersion>preview</LangVersion>
     <SignAssembly>true</SignAssembly>
     <RepoRoot>$([System.IO.Directory]::GetParent($(MSBuildThisFileDirectory)).Parent.FullName)</RepoRoot>
     <StrongNameKeyBase64File>$(MSBuildThisFileDirectory)OpenTelemetry.snk.base64</StrongNameKeyBase64File>
@@ -97,19 +98,19 @@ finally
     <NetFrameworkSupportedVersions>net481;net48;net472;net471;net47;net462</NetFrameworkSupportedVersions>
 
     <!-- production TFMs -->
-    <TargetFrameworksForLibraries>net10.0;net9.0;net8.0;netstandard2.0;$(NetFrameworkMinimumSupportedVersion)</TargetFrameworksForLibraries>
-    <TargetFrameworksForLibrariesExtended>net10.0;net9.0;net8.0;netstandard2.1;netstandard2.0;$(NetFrameworkMinimumSupportedVersion)</TargetFrameworksForLibrariesExtended>
-    <TargetFrameworksForPrometheusAspNetCore>net10.0;net9.0;net8.0</TargetFrameworksForPrometheusAspNetCore>
+    <TargetFrameworksForLibraries>net11.0;net10.0;netstandard2.0;$(NetFrameworkMinimumSupportedVersion)</TargetFrameworksForLibraries>
+    <TargetFrameworksForLibrariesExtended>net11.0;net10.0;netstandard2.1;netstandard2.0;$(NetFrameworkMinimumSupportedVersion)</TargetFrameworksForLibrariesExtended>
+    <TargetFrameworksForPrometheusAspNetCore>net11.0;net10.0</TargetFrameworksForPrometheusAspNetCore>
     <TargetFrameworksRequiringSystemTextJsonDirectReference>netstandard2.1;netstandard2.0;$(NetFrameworkMinimumSupportedVersion)</TargetFrameworksRequiringSystemTextJsonDirectReference>
 
     <!-- non-production TFMs -->
-    <TargetFrameworksForAspNetCoreTests>net10.0;net9.0;net8.0</TargetFrameworksForAspNetCoreTests>
-    <TargetFrameworksForAotCompatibilityTests>net10.0;net9.0;net8.0</TargetFrameworksForAotCompatibilityTests>
-    <TargetFrameworksForDocs>net10.0;net9.0;net8.0</TargetFrameworksForDocs>
+    <TargetFrameworksForAspNetCoreTests>net11.0;net10.0</TargetFrameworksForAspNetCoreTests>
+    <TargetFrameworksForAotCompatibilityTests>net11.0;net10.0</TargetFrameworksForAotCompatibilityTests>
+    <TargetFrameworksForDocs>net11.0;net10.0</TargetFrameworksForDocs>
     <TargetFrameworksForDocs Condition="$(OS) == 'Windows_NT' And '$(UsingMicrosoftNETSdkWeb)' != 'True'">
       $(TargetFrameworksForDocs);$(NetFrameworkSupportedVersions)
     </TargetFrameworksForDocs>
-    <TargetFrameworksForTests>net10.0;net9.0;net8.0</TargetFrameworksForTests>
+    <TargetFrameworksForTests>net11.0;net10.0</TargetFrameworksForTests>
     <TargetFrameworksForTests Condition="$(OS) == 'Windows_NT'">
       $(TargetFrameworksForTests);$(NetFrameworkMinimumSupportedVersion)
     </TargetFrameworksForTests>

build/docker-compose.net10.0.yml

@@ -4,4 +4,4 @@ services:
       args:
         PUBLISH_FRAMEWORK: net10.0
         TEST_SDK_VERSION: "10.0"
-        BUILD_SDK_VERSION: "10.0"
+        BUILD_SDK_VERSION: "11.0"

build/docker-compose.net11.0.yml

@@ -0,0 +1,7 @@
+services:
+  tests:
+    build:
+      args:
+        PUBLISH_FRAMEWORK: net11.0
+        TEST_SDK_VERSION: "11.0"
+        BUILD_SDK_VERSION: "11.0"

examples/MicroserviceExample/Utils/Utils.csproj

@@ -4,7 +4,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="RabbitMQ.Client" />
   </ItemGroup>
 

examples/MicroserviceExample/WebApi/Dockerfile

@@ -1,18 +1,16 @@
-ARG SDK_VERSION=10.0
-FROM mcr.microsoft.com/dotnet/sdk:8.0.423@sha256:89ce6291bde9acdf59594e79fb8277c6d84c46e4b1f5bf126a4f18766e4bd597 AS dotnet-sdk-8.0
-FROM mcr.microsoft.com/dotnet/sdk:9.0.316@sha256:ee0d20fbc3dfc60ae2d9d9115a9b750c18576a47f24073119dd09d93e072cb89 AS dotnet-sdk-9.0
+ARG SDK_VERSION=11.0
 FROM mcr.microsoft.com/dotnet/sdk:10.0.302@sha256:ed034a8bf0b24ded0cbbac07e17825d8e9ebfe21e308191d0f7421eaf5ad4664 AS dotnet-sdk-10.0
+FROM mcr.microsoft.com/dotnet/sdk:11.0.100-preview.6@sha256:030c48b4cf79d68d5cae35afb9e529ce66bc7d40397ac11a8a52fc8e14ced226 AS dotnet-sdk-11.0
 
 FROM dotnet-sdk-${SDK_VERSION} AS build
 ARG PUBLISH_CONFIGURATION=Release
-ARG PUBLISH_FRAMEWORK=net10.0
+ARG PUBLISH_FRAMEWORK=net11.0
 WORKDIR /app
 COPY . ./
 RUN dotnet publish ./examples/MicroserviceExample/WebApi -c "${PUBLISH_CONFIGURATION}" -f "${PUBLISH_FRAMEWORK}" -o /out -p:IntegrationBuild=true
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0.29@sha256:9822a6201c64c9f38b8a190832a7ae21cd30150d509b3ea170fd83b4f4e6166a AS dotnet-aspnet-8.0
-FROM mcr.microsoft.com/dotnet/aspnet:9.0.18@sha256:8b9f90e53d41154d42e537517aef22e8fe497baabd43e423d5f2edafd06f04f6 AS dotnet-aspnet-9.0
 FROM mcr.microsoft.com/dotnet/aspnet:10.0.10@sha256:1fa23fc4872d95fd71c2833ebe65d7e84a43b2d51a31d119516852f13d9505a7 AS dotnet-aspnet-10.0
+FROM mcr.microsoft.com/dotnet/aspnet:11.0.0-preview.6@sha256:b2ebd23166ecc80db02c1086ccfdf266ce738d315036f44303bd2e03bd9d7907 AS dotnet-aspnet-11.0
 
 FROM dotnet-aspnet-${SDK_VERSION} AS runtime
 WORKDIR /app

examples/MicroserviceExample/WorkerService/Dockerfile

@@ -1,19 +1,17 @@
-ARG SDK_VERSION=10.0
+ARG SDK_VERSION=11.0
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0.423@sha256:89ce6291bde9acdf59594e79fb8277c6d84c46e4b1f5bf126a4f18766e4bd597 AS dotnet-sdk-8.0
-FROM mcr.microsoft.com/dotnet/sdk:9.0.316@sha256:ee0d20fbc3dfc60ae2d9d9115a9b750c18576a47f24073119dd09d93e072cb89 AS dotnet-sdk-9.0
 FROM mcr.microsoft.com/dotnet/sdk:10.0.302@sha256:ed034a8bf0b24ded0cbbac07e17825d8e9ebfe21e308191d0f7421eaf5ad4664 AS dotnet-sdk-10.0
+FROM mcr.microsoft.com/dotnet/sdk:11.0.100-preview.6@sha256:030c48b4cf79d68d5cae35afb9e529ce66bc7d40397ac11a8a52fc8e14ced226 AS dotnet-sdk-11.0
 
 FROM dotnet-sdk-${SDK_VERSION} AS build
 ARG PUBLISH_CONFIGURATION=Release
-ARG PUBLISH_FRAMEWORK=net10.0
+ARG PUBLISH_FRAMEWORK=net11.0
 WORKDIR /app
 COPY . ./
 RUN dotnet publish ./examples/MicroserviceExample/WorkerService -c "${PUBLISH_CONFIGURATION}" -f "${PUBLISH_FRAMEWORK}" -o /out -p:IntegrationBuild=true
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0.29@sha256:9822a6201c64c9f38b8a190832a7ae21cd30150d509b3ea170fd83b4f4e6166a AS dotnet-aspnet-8.0
-FROM mcr.microsoft.com/dotnet/aspnet:9.0.18@sha256:8b9f90e53d41154d42e537517aef22e8fe497baabd43e423d5f2edafd06f04f6 AS dotnet-aspnet-9.0
 FROM mcr.microsoft.com/dotnet/aspnet:10.0.10@sha256:1fa23fc4872d95fd71c2833ebe65d7e84a43b2d51a31d119516852f13d9505a7 AS dotnet-aspnet-10.0
+FROM mcr.microsoft.com/dotnet/aspnet:11.0.0-preview.6@sha256:b2ebd23166ecc80db02c1086ccfdf266ce738d315036f44303bd2e03bd9d7907 AS dotnet-aspnet-11.0
 
 FROM dotnet-aspnet-${SDK_VERSION} AS runtime
 WORKDIR /app

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
     "allowPrerelease": false,
-    "version": "10.0.302"
+    "version": "11.0.100-preview.6.26359.118"
   }
 }

src/OpenTelemetry.Api/CompatibilitySuppressions.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+    <Suppression>
+        <DiagnosticId>CP0008</DiagnosticId>
+        <Target>T:OpenTelemetry.Trace.SpanKind</Target>
+        <Left>lib/net8.0/OpenTelemetry.Api.dll</Left>
+        <Right>lib/netstandard2.0/OpenTelemetry.Api.dll</Right>
+        <IsBaselineSuppression>true</IsBaselineSuppression>
+    </Suppression>
+    <Suppression>
+        <DiagnosticId>CP0008</DiagnosticId>
+        <Target>T:OpenTelemetry.Trace.StatusCode</Target>
+        <Left>lib/net8.0/OpenTelemetry.Api.dll</Left>
+        <Right>lib/netstandard2.0/OpenTelemetry.Api.dll</Right>
+        <IsBaselineSuppression>true</IsBaselineSuppression>
+    </Suppression>
+    <Suppression>
+        <DiagnosticId>CP0008</DiagnosticId>
+        <Target>T:OpenTelemetry.Trace.SpanKind</Target>
+        <Left>lib/net9.0/OpenTelemetry.Api.dll</Left>
+        <Right>lib/netstandard2.0/OpenTelemetry.Api.dll</Right>
+        <IsBaselineSuppression>true</IsBaselineSuppression>
+    </Suppression>
+    <Suppression>
+        <DiagnosticId>CP0008</DiagnosticId>
+        <Target>T:OpenTelemetry.Trace.StatusCode</Target>
+        <Left>lib/net9.0/OpenTelemetry.Api.dll</Left>
+        <Right>lib/netstandard2.0/OpenTelemetry.Api.dll</Right>
+        <IsBaselineSuppression>true</IsBaselineSuppression>
+    </Suppression>
+</Suppressions>

src/OpenTelemetry.Api/Context/Propagation/B3Propagator.cs

@@ -38,7 +38,7 @@ public sealed class B3Propagator : TextMapPropagator
 
     private static readonly HashSet<string> AllFields = [XB3TraceId, XB3SpanId, XB3ParentSpanId, XB3Sampled, XB3Flags];
 
-    private static readonly HashSet<string> SampledValues = new(StringComparer.Ordinal) { SampledValue, LegacySampledValue };
+    private static readonly HashSet<string> SampledValues = [with(StringComparer.Ordinal), SampledValue, LegacySampledValue];
 
     private readonly bool singleHeader;
 

src/OpenTelemetry.Api/Context/Propagation/BaggagePropagator.cs

@@ -243,7 +243,7 @@ internal static bool TryExtractBaggage(
                     continue;
                 }
 
-                baggageDictionary ??= new(StringComparer.Ordinal);
+                baggageDictionary ??= [with(StringComparer.Ordinal)];
                 baggageDictionary[key] = value;
             }
         }