SteeltoeOSS · bart-vmware · Aug 21, 2025 · Aug 21, 2025 · Aug 21, 2025 · Sep 14, 2025
diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "jetbrains.resharper.globaltools": {
-      "version": "2025.2.0",
+      "version": "2025.2.1",
       "commands": [
         "jb"
       ],

diff --git a/.github/workflows/Steeltoe.All.yml b/.github/workflows/Steeltoe.All.yml
@@ -65,6 +65,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Turn off dev certificate (macOS only)
       if: ${{ matrix.os == 'macos-latest' }}
       # Setting DOTNET_GENERATE_ASPNET_CERTIFICATE to "false" makes it easier to determine which test failed on macOS when it tried to start a web server with https enabled.
@@ -106,6 +112,12 @@ jobs:
     - name: Test (net9.0) (memory dumps)
       run: dotnet test ${{ env.SOLUTION_FILE }} --framework net9.0 --filter "${{ env.SKIP_FILTER_WITH_MEMORY_DUMPS }}" ${{ env.COMMON_TEST_ARGS }}
 
+    - name: Test (net10.0)
+      run: dotnet test ${{ env.SOLUTION_FILE }} --framework net10.0 --filter "${{ env.SKIP_FILTER_NO_MEMORY_DUMPS }}" ${{ env.COMMON_TEST_ARGS }}
+
+    - name: Test (net10.0) (memory dumps)
+      run: dotnet test ${{ env.SOLUTION_FILE }} --framework net10.0 --filter "${{ env.SKIP_FILTER_WITH_MEMORY_DUMPS }}" ${{ env.COMMON_TEST_ARGS }}
+
     - name: Upload crash/hang dumps (on failure)
       if: ${{ failure() }}
       uses: actions/upload-artifact@v4

diff --git a/.github/workflows/component-shared-workflow.yml b/.github/workflows/component-shared-workflow.yml
@@ -62,6 +62,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Turn off dev certificate (macOS only)
       if: ${{ inputs.OS == 'macos' }}
       # Setting DOTNET_GENERATE_ASPNET_CERTIFICATE to "false" makes it easier to determine which test failed on macOS when it tried to start a web server with https enabled.
@@ -99,6 +105,13 @@ jobs:
       if: ${{ inputs.component == 'Management' }}
       run: dotnet test ${{ env.SOLUTION_FILE }} --framework net9.0 ${{ env.SKIP_FILTER_WITH_MEMORY_DUMPS }} ${{ env.COMMON_TEST_ARGS }}
 
+    - name: Test (net10.0)
+      run: dotnet test ${{ env.SOLUTION_FILE }} --framework net10.0 ${{ env.SKIP_FILTER_NO_MEMORY_DUMPS }} ${{ env.COMMON_TEST_ARGS }}
+
+    - name: Test (net10.0) (memory dumps)
+      if: ${{ inputs.component == 'Management' }}
+      run: dotnet test ${{ env.SOLUTION_FILE }} --framework net10.0 ${{ env.SKIP_FILTER_WITH_MEMORY_DUMPS }} ${{ env.COMMON_TEST_ARGS }}
+
     - name: Upload crash/hang dumps (on failure)
       if: ${{ failure() }}
       uses: actions/upload-artifact@v4

diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
@@ -38,6 +38,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Git checkout
       uses: actions/checkout@v4
       with:

diff --git a/.github/workflows/scan-vulnerable-dependencies.yml b/.github/workflows/scan-vulnerable-dependencies.yml
@@ -34,6 +34,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Git checkout
       uses: actions/checkout@v4
       with:

diff --git a/.github/workflows/sonarcube.yml b/.github/workflows/sonarcube.yml
@@ -54,6 +54,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Install Sonar .NET Scanner
       run: dotnet tool install --global dotnet-sonarscanner
 
@@ -90,6 +96,12 @@ jobs:
     - name: Test (net9.0) (memory dumps)
       run: dotnet test ${{ env.SOLUTION_FILE }} --filter "Category=MemoryDumps" --framework net9.0  ${{ env.SONAR_TEST_ARGS }}
 
+    - name: Test (net10.0)
+      run: dotnet test ${{ env.SOLUTION_FILE }} --filter "Category!=MemoryDumps" --framework net10.0  ${{ env.SONAR_TEST_ARGS }}
+
+    - name: Test (net10.0) (memory dumps)
+      run: dotnet test ${{ env.SOLUTION_FILE }} --filter "Category=MemoryDumps" --framework net10.0  ${{ env.SONAR_TEST_ARGS }}
+
     - name: End Sonar .NET scanner
       if: ${{ !cancelled() && steps.sonar_begin.outcome == 'success' }}
       env:

diff --git a/.github/workflows/verify-code-style.yml b/.github/workflows/verify-code-style.yml
@@ -33,6 +33,12 @@ jobs:
           8.0.*
           9.0.*
 
+    - name: Setup .NET 10 (preview)
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.*
+        dotnet-quality: preview
+
     - name: Git checkout
       uses: actions/checkout@v4
       with:

diff --git a/shared-test.props b/shared-test.props
@@ -4,6 +4,13 @@
     <NoWarn>$(NoWarn);S2094;S3717;SA1602;CA1062;CA1707;NU5104</NoWarn>
   </PropertyGroup>
 
+  <!-- .NET 10 Preview -->
+  <PropertyGroup>
+    <!-- ASPDEPR004: 'WebHostBuilder' is deprecated in favor of HostBuilder and WebApplicationBuilder. -->
+    <!-- ASPDEPR008: 'IWebHost' is obsolete: Use IHost instead. -->
+    <NoWarn>$(NoWarn);ASPDEPR004;ASPDEPR008</NoWarn>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- https://github.com/xunit/xunit/issues/3238#issuecomment-2770720936 -->
     <TestTfmsInParallel>false</TestTfmsInParallel>

diff --git a/shared.props b/shared.props
@@ -12,6 +12,13 @@
     <GenerateNeutralResourcesLanguageAttribute>false</GenerateNeutralResourcesLanguageAttribute>
   </PropertyGroup>
 
+  <!-- .NET 10 Preview -->
+  <PropertyGroup>
+    <LangVersion>preview</LangVersion>
+    <!-- CA1873: Evaluation of this argument may be expensive and unnecessary if logging is disabled -->
+    <NoWarn>$(NoWarn);CA1873</NoWarn>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!--
       Disabled IDE analyzers for "Remove unused member" (IDE0051, IDE0052) because they currently don't "see" code added

diff --git a/src/Bootstrap/test/AutoConfiguration.Test/Steeltoe.Bootstrap.AutoConfiguration.Test.csproj b/src/Bootstrap/test/AutoConfiguration.Test/Steeltoe.Bootstrap.AutoConfiguration.Test.csproj
@@ -1,6 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />
@@ -11,7 +11,7 @@
     <PackageReference Include="Microsoft.Extensions.Caching.StackExchangeRedis" Version="$(MatchTargetFrameworkVersion)" />
     <PackageReference Include="MongoDB.Driver" Version="$(MongoDbDriverVersion)" />
     <PackageReference Include="MySqlConnector" Version="$(MySqlConnectorVersion)" />
-    <PackageReference Include="Npgsql" Version="$(EntityFrameworkCoreTestVersion)" />
+    <PackageReference Include="Npgsql" Version="$(NpgsqlTestVersion)" />
     <PackageReference Include="RabbitMQ.Client" Version="$(RabbitClientTestVersion)" />
   </ItemGroup>
 

diff --git a/...ap/test/EmptyAutoConfiguration.Test/Steeltoe.Bootstrap.EmptyAutoConfiguration.Test.csproj b/...ap/test/EmptyAutoConfiguration.Test/Steeltoe.Bootstrap.EmptyAutoConfiguration.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Certificates.Test/Steeltoe.Common.Certificates.Test.csproj b/src/Common/test/Certificates.Test/Steeltoe.Common.Certificates.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Common.Test/Steeltoe.Common.Test.csproj b/src/Common/test/Common.Test/Steeltoe.Common.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Hosting.Test/Steeltoe.Common.Hosting.Test.csproj b/src/Common/test/Hosting.Test/Steeltoe.Common.Hosting.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Http.Test/Steeltoe.Common.Http.Test.csproj b/src/Common/test/Http.Test/Steeltoe.Common.Http.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Logging.Test/Steeltoe.Common.Logging.Test.csproj b/src/Common/test/Logging.Test/Steeltoe.Common.Logging.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/Net.Test/Steeltoe.Common.Net.Test.csproj b/src/Common/test/Net.Test/Steeltoe.Common.Net.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Common/test/TestResources/HostWrapper.cs b/src/Common/test/TestResources/HostWrapper.cs
@@ -7,6 +7,8 @@
 using Microsoft.AspNetCore.TestHost;
 using Microsoft.Extensions.Hosting;
 
+#pragma warning disable ASPDEPR008 // 'IWebHost' is obsolete: Use IHost instead.
+
 namespace Steeltoe.Common.TestResources;
 
 public sealed class HostWrapper : IAsyncDisposable

diff --git a/src/Common/test/TestResources/Steeltoe.Common.TestResources.csproj b/src/Common/test/TestResources/Steeltoe.Common.TestResources.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

diff --git a/src/Common/test/TestResources/TestWebHostBuilderFactory.cs b/src/Common/test/TestResources/TestWebHostBuilderFactory.cs
@@ -9,6 +9,8 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 
+#pragma warning disable ASPDEPR004 // 'WebHostBuilder' is deprecated in favor of HostBuilder and WebApplicationBuilder.
+
 namespace Steeltoe.Common.TestResources;
 
 public static class TestWebHostBuilderFactory

diff --git a/src/Configuration/src/Abstractions/CompositeConfigurationProvider.cs b/src/Configuration/src/Abstractions/CompositeConfigurationProvider.cs
@@ -97,10 +97,14 @@ public void Set(string key, string? value)
 
         LogSet(GetType().Name, key, value);
 
+#pragma warning disable IDE0031 // Use null propagation
+        // ReSharper disable once UseNullPropagation
+        // Justification: Triggers warning in Sonar, which doesn't support .NET 10 yet.
         if (ConfigurationRoot != null)
         {
             ConfigurationRoot[key] = value;
         }
+#pragma warning restore IDE0031 // Use null propagation
     }
 
     public void Dispose()

diff --git a/src/Configuration/src/SpringBoot/SpringBootEnvironmentVariableProvider.cs b/src/Configuration/src/SpringBoot/SpringBootEnvironmentVariableProvider.cs
@@ -13,6 +13,7 @@ namespace Steeltoe.Configuration.SpringBoot;
 internal sealed class SpringBootEnvironmentVariableProvider : JsonStreamConfigurationProvider
 {
     private const string SpringApplicationJson = "SPRING_APPLICATION_JSON";
+    private static readonly bool IsAtLeastDotNet10 = typeof(JsonStreamConfigurationProvider).Assembly.GetName().Version?.Major >= 10;
     private readonly string? _springApplicationJson;
     private bool _loaded;
 
@@ -61,7 +62,8 @@ public override void Load()
             {
                 string? value = Data[key];
 
-                if (value != null)
+                // Breaking change in JsonConfigurationFileParser at https://github.com/dotnet/runtime/pull/116677.
+                if (IsAtLeastDotNet10 || value != null)
                 {
                     string newKey = key.Contains('.') ? key.Replace('.', ':') : key;
                     data[newKey] = value;

diff --git a/src/Configuration/test/CloudFoundry.Test/CloudfoundryConfigurationProviderTest.cs b/src/Configuration/test/CloudFoundry.Test/CloudfoundryConfigurationProviderTest.cs
@@ -12,7 +12,14 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
 using Steeltoe.Common.TestResources;
-using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
+using IPNetwork =
+#if NET10_0_OR_GREATER
+    System.Net.IPNetwork;
+
+#else
+    Microsoft.AspNetCore.HttpOverrides.IPNetwork;
+
+#endif
 
 namespace Steeltoe.Configuration.CloudFoundry.Test;
 
@@ -244,14 +251,22 @@ public async Task ForwardedHeadersOptions_unrestricted_when_running_on_CloudFoun
         {
             options.ForwardedHeaders.Should().HaveFlag(ForwardedHeaders.XForwardedFor);
             options.ForwardedHeaders.Should().HaveFlag(ForwardedHeaders.XForwardedProto);
+#if NET10_0_OR_GREATER
+            options.KnownIPNetworks.Should().BeEmpty();
+#else
             options.KnownNetworks.Should().BeEmpty();
+#endif
             options.KnownProxies.Should().BeEmpty();
         }
         else
         {
             options.ForwardedHeaders.Should().NotHaveFlag(ForwardedHeaders.XForwardedFor);
             options.ForwardedHeaders.Should().NotHaveFlag(ForwardedHeaders.XForwardedProto);
+#if NET10_0_OR_GREATER
+            options.KnownIPNetworks.Should().ContainSingle().Which.Should().BeEquivalentTo(IPNetwork.Parse("127.0.0.1/8"));
+#else
             options.KnownNetworks.Should().ContainSingle().Which.Should().BeEquivalentTo(IPNetwork.Parse("127.0.0.1/8"));
+#endif
             options.KnownProxies.Should().ContainSingle().Which.Should().Be(IPAddress.Parse("::1"));
         }
     }

diff --git a/src/Configuration/test/CloudFoundry.Test/Steeltoe.Configuration.CloudFoundry.Test.csproj b/src/Configuration/test/CloudFoundry.Test/Steeltoe.Configuration.CloudFoundry.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/...est/ConfigServer.Discovery.Test/Steeltoe.Configuration.ConfigServer.Discovery.Test.csproj b/...est/ConfigServer.Discovery.Test/Steeltoe.Configuration.ConfigServer.Discovery.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/...ConfigServer.Integration.Test/Steeltoe.Configuration.ConfigServer.Integration.Test.csproj b/...ConfigServer.Integration.Test/Steeltoe.Configuration.ConfigServer.Integration.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Configuration/test/ConfigServer.Test/Steeltoe.Configuration.ConfigServer.Test.csproj b/src/Configuration/test/ConfigServer.Test/Steeltoe.Configuration.ConfigServer.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Configuration/test/Encryption.Test/Steeltoe.Configuration.Encryption.Test.csproj b/src/Configuration/test/Encryption.Test/Steeltoe.Configuration.Encryption.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/...rnetes.ServiceBindings.Test/Steeltoe.Configuration.Kubernetes.ServiceBindings.Test.csproj b/...rnetes.ServiceBindings.Test/Steeltoe.Configuration.Kubernetes.ServiceBindings.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Configuration/test/Placeholder.Test/Steeltoe.Configuration.Placeholder.Test.csproj b/src/Configuration/test/Placeholder.Test/Steeltoe.Configuration.Placeholder.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />

diff --git a/src/Configuration/test/RandomValue.Test/Steeltoe.Configuration.RandomValue.Test.csproj b/src/Configuration/test/RandomValue.Test/Steeltoe.Configuration.RandomValue.Test.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\shared.props" />