Skip .NET Framework tests on non-Windows platforms (#1226)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

.github/workflows/ci-build-test.yml

@@ -47,15 +47,6 @@ jobs:
           10.0.x
           9.0.x
 
-    # NetFX testing on non-Windows requires mono
-    - name: 🔧 Setup Mono
-      if: runner.os == 'Linux'
-      run: sudo apt-get install -y mono-devel
-
-    - name: 🔧 Setup Mono on macOS
-      if: runner.os == 'macOS'
-      run: brew install mono
-
     - name: 🔧 Set up Node.js
       uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
       with:

Directory.Build.props

@@ -45,4 +45,10 @@
     <!-- Don't use x64 when running netfx test procs on Windows ARM -->
     <PreferNativeArm64>true</PreferNativeArm64>
   </PropertyGroup>
+
+  <PropertyGroup>
+    <!-- Shared target frameworks for test projects and test support projects. net472 is only included on Windows. -->
+    <DefaultTestTargetFrameworks>net10.0;net9.0;net8.0</DefaultTestTargetFrameworks>
+    <DefaultTestTargetFrameworks Condition="$([MSBuild]::IsOSPlatform('Windows'))">$(DefaultTestTargetFrameworks);net472</DefaultTestTargetFrameworks>
+  </PropertyGroup>
 </Project>

samples/TestServerWithHosting/TestServerWithHosting.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net10.0;net9.0;net8.0;net472</TargetFrameworks>
+    <TargetFrameworks>$(DefaultTestTargetFrameworks)</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <PublishAot Condition="'$(TargetFramework)' == 'net9.0'">true</PublishAot>

tests/ModelContextProtocol.TestServer/ModelContextProtocol.TestServer.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net10.0;net9.0;net8.0;net472</TargetFrameworks>
+    <TargetFrameworks>$(DefaultTestTargetFrameworks)</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <AssemblyName>TestServer</AssemblyName>

tests/ModelContextProtocol.Tests/ModelContextProtocol.Tests.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net10.0;net9.0;net8.0;net472</TargetFrameworks>
+    <TargetFrameworks>$(DefaultTestTargetFrameworks)</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>