Load NuGet.Frameworks into secondary AppDomain (MSBuild.exe only)

documentation/wiki/ChangeWaves.md

@@ -30,6 +30,7 @@ A wave of features is set to "rotate out" (i.e. become standard functionality) t
 - [Target parameters will be unquoted](https://github.com/dotnet/msbuild/pull/9452), meaning  the ';' symbol in the parameter target name will always be treated as separator
 - [Change Version switch output to finish with a newline](https://github.com/dotnet/msbuild/pull/9485)
 - [Load Microsoft.DotNet.MSBuildSdkResolver into default load context (MSBuild.exe only)](https://github.com/dotnet/msbuild/pull/9439)
+- [Load NuGet.Frameworks into secondary AppDomain (MSBuild.exe only)](https://github.com/dotnet/msbuild/pull/9446)
 
 ### 17.8
 - [[RAR] Don't do I/O on SDK-provided references](https://github.com/dotnet/msbuild/pull/8688)

src/Build.UnitTests/ProjectCache/ProjectCacheTests.cs

@@ -557,6 +557,7 @@ public void ProjectCacheByVsScenarioIgnoresSlnDisabledProjects()
                         currentBuildEnvironment.Mode,
                         currentBuildEnvironment.CurrentMSBuildExePath,
                         currentBuildEnvironment.RunningTests,
+                        currentBuildEnvironment.RunningInMSBuildExe,
                         runningInVisualStudio: true,
                         visualStudioPath: currentBuildEnvironment.VisualStudioInstallRootDirectory));
 
@@ -674,6 +675,7 @@ public void DesignTimeBuildsDuringVsScenarioShouldDisableTheCache()
                         currentBuildEnvironment.Mode,
                         currentBuildEnvironment.CurrentMSBuildExePath,
                         currentBuildEnvironment.RunningTests,
+                        currentBuildEnvironment.RunningInMSBuildExe,
                         runningInVisualStudio: true,
                         visualStudioPath: currentBuildEnvironment.VisualStudioInstallRootDirectory));
 
@@ -1440,6 +1442,7 @@ public void ParallelStressTestForVsScenario(bool useSynchronousLogging, bool dis
                         currentBuildEnvironment.Mode,
                         currentBuildEnvironment.CurrentMSBuildExePath,
                         currentBuildEnvironment.RunningTests,
+                        currentBuildEnvironment.RunningInMSBuildExe,
                         runningInVisualStudio: true,
                         visualStudioPath: currentBuildEnvironment.VisualStudioInstallRootDirectory));
 

src/Build/Evaluation/IntrinsicFunctions.cs

@@ -35,7 +35,7 @@ internal static class IntrinsicFunctions
 
         private static readonly Lazy<Regex> RegistrySdkRegex = new Lazy<Regex>(() => new Regex(@"^HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Microsoft SDKs\\Windows\\v(\d+\.\d+)$", RegexOptions.IgnoreCase));
 
-        private static readonly Lazy<NuGetFrameworkWrapper> NuGetFramework = new Lazy<NuGetFrameworkWrapper>(() => new NuGetFrameworkWrapper());
+        private static readonly Lazy<NuGetFrameworkWrapper> NuGetFramework = new Lazy<NuGetFrameworkWrapper>(() => NuGetFrameworkWrapper.CreateInstance());
 
         /// <summary>
         /// Add two doubles

src/Build/Microsoft.Build.csproj

@@ -670,4 +670,54 @@
       <LogicalName>$(AssemblyName).Strings.shared.resources</LogicalName>
     </EmbeddedResource>
   </ItemGroup>
+
+  <PropertyGroup>
+    <NuGetFrameworkWrapperRedirects_FilePath>$(IntermediateOutputPath)NuGetFrameworkWrapper.redirects.cs</NuGetFrameworkWrapperRedirects_FilePath>
+  </PropertyGroup>
+
+  <!-- Extract binding redirects for Microsoft.Build from MSBuild.exe.config into a source file -->
+  <Target Name="GenerateAppDomainConfig"
+          Inputs="..\MSBuild\app.config;..\MSBuild\app.amd64.config"
+          Outputs="$(NuGetFrameworkWrapperRedirects_FilePath)"
+          BeforeTargets="CoreCompile"
+          Condition="'$(FeatureAppDomain)' == 'true'">
+    <PropertyGroup>
+      <BindingRedirectNamespace>&lt;Namespace Prefix='ns' Uri='urn:schemas-microsoft-com:asm.v1' /&gt;</BindingRedirectNamespace>
+      <BindingRedirectXPath>/configuration/runtime/ns:assemblyBinding/ns:dependentAssembly[ns:assemblyIdentity/@name='Microsoft.Build']</BindingRedirectXPath>
+    </PropertyGroup>
+
+    <XmlPeek XmlInputPath="..\MSBuild\app.config" Query="$(BindingRedirectXPath)" Namespaces="$(BindingRedirectNamespace)">
+      <Output TaskParameter="Result" ItemName="BindingRedirect32" />
+    </XmlPeek>
+    <XmlPeek XmlInputPath="..\MSBuild\app.amd64.config" Query="$(BindingRedirectXPath)" Namespaces="$(BindingRedirectNamespace)">
+      <Output TaskParameter="Result" ItemName="BindingRedirect64" />
+    </XmlPeek>
+
+    <PropertyGroup>
+      <NuGetFrameworkWrapperRedirects_Content><![CDATA[
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace Microsoft.Build.Evaluation%3B;
+
+[System.CodeDom.Compiler.GeneratedCode("GenerateAppDomainConfig", "1.0")]
+internal sealed partial class NuGetFrameworkWrapper
+{
+    private const string _bindingRedirect32 = """;@(BindingRedirect32);"""%3B;
+    private const string _bindingRedirect64 = """;@(BindingRedirect64);"""%3B;
+}
+]]>
+      </NuGetFrameworkWrapperRedirects_Content>
+    </PropertyGroup>
+
+    <WriteLinesToFile File="$(NuGetFrameworkWrapperRedirects_FilePath)" Overwrite="true" WriteOnlyWhenDifferent="true" Lines="$(NuGetFrameworkWrapperRedirects_Content)" />
+
+    <ItemGroup>
+      <Compile Remove="$(NuGetFrameworkWrapperRedirects_FilePath)" />
+      <Compile Include="$(NuGetFrameworkWrapperRedirects_FilePath)">
+        <Link>Utilities\NuGetFrameworkWrapper.redirects.cs</Link>
+      </Compile>
+      <FileWrites Include="$(NuGetFrameworkWrapperRedirects_FilePath)" />
+    </ItemGroup>
+  </Target>
 </Project>

src/Build/Resources/Strings.resx

@@ -1889,7 +1889,7 @@ Utilization:          {0} Average Utilization: {1:###.0}</value>
     <value>Property initial value: $({0})="{1}" Source: {2}</value>
   </data>
   <data name="NuGetAssemblyNotFound" xml:space="preserve">
-    <value>A required NuGet assembly was not found. Expected Path: {0}</value>
+    <value>A required NuGet assembly '{0}' could not be loaded.</value>
   </data>
   <data name="StaticGraphConstructionMetrics" xml:space="preserve">
     <value>Static graph loaded in {0} seconds: {1} nodes, {2} edges</value>