Move away from nuspec for MSTest metapackage

samples/Playground/Playground.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
@@ -38,5 +38,5 @@
   </ItemGroup>
 
   <!-- Import the capabilities for the Microsoft.Testing.Platform -->
-  <Import Project="$(RepoRoot)src\Platform\Microsoft.Testing.Platform\buildMultiTargeting\Microsoft.Testing.Platform.props"/>
+  <Import Project="$(RepoRoot)src\Platform\Microsoft.Testing.Platform\buildMultiTargeting\Microsoft.Testing.Platform.props" />
 </Project>

src/Package/MSTest/MSTest.csproj

@@ -1,16 +1,21 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFrameworks>netstandard2.0</TargetFrameworks>
-  </PropertyGroup>
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">netstandard2.0;$(NetFrameworkMinimum);$(SupportedNetFrameworks);$(UwpMinimum);$(WinUiMinimum)</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">$(SupportedNetFrameworks);netstandard2.0</TargetFrameworks>
+
+    <!--
+      warning NETSDK1023: A PackageReference for 'Microsoft.NET.Test.Sdk' was included in your project. This package
+                          is implicitly referenced by the .NET SDK and you do not typically need to reference it from
+                          your project. For more information, see https://aka.ms/sdkimplicitrefs
+    -->
+    <NoWarn>$(NoWarn);NETSDK1023</NoWarn>
+
+    <IncludeBuildOutput>false</IncludeBuildOutput>
     <IsPackable>true</IsPackable>
-    <NuspecFile Condition=" '$(OS)' == 'Windows_NT' ">MSTest.nuspec</NuspecFile>
-    <NuspecFile Condition=" '$(OS)' != 'Windows_NT' ">MSTest.NonWindows.nuspec</NuspecFile>
-    <NuspecBasePath>$(OutputPath)</NuspecBasePath>
     <PackageId>MSTest</PackageId>
     <PackageTags>MSTest TestFramework TestAdapter VisualStudio Unittest MSTestV2 Microsoft</PackageTags>
+    <PackageReadmeFile>PACKAGE.md</PackageReadmeFile>
     <PackageDescription>
       MSTest is Microsoft supported Test Framework.
 
@@ -23,19 +28,29 @@
       - .NET 6.0 Windows.18362+
       - UWP 10.0.16299
     </PackageDescription>
-    <!-- Nothing in lib but that's expected -->
-    <NoWarn>$(NoWarn);NU5128</NoWarn>
+
+    <TargetsForTfmSpecificContentInPackage>$(TargetsForTfmSpecificContentInPackage);_AddEmptyTfmDirectoryInLib</TargetsForTfmSpecificContentInPackage>
   </PropertyGroup>
 
-  <ItemGroup Label="NuGet">
-    <NuspecProperty Include="TestPlatformVersion=$(MicrosoftNETTestSdkVersion)" />
-    <NuspecProperty Include="RepoRoot=$(RepoRoot)" />
-  </ItemGroup>
+  <Target Name="_AddEmptyTfmDirectoryInLib">
+    <ItemGroup>
+      <TfmSpecificPackageFile Include="_._" PackagePath="lib/$(TargetFramework)/" />
+    </ItemGroup>
+  </Target>
 
   <ItemGroup>
-    <!-- Not a real dependency but it ensures correct build order -->
     <ProjectReference Include="..\..\Adapter\MSTest.TestAdapter\MSTest.TestAdapter.csproj" />
+    <ProjectReference Include="..\..\TestFramework\TestFramework.Extensions\TestFramework.Extensions.csproj" />
+    <ProjectReference Include="..\..\Analyzers\MSTest.Analyzers.Package\MSTest.Analyzers.Package.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <!-- Microsoft.NET.Test.Sdk package is referenced by build system, so omitting it. -->
+    <PackageReference Include="Microsoft.NET.Test.Sdk" VersionOverride="$(MicrosoftNETTestSdkVersion)" Condition="'$(TargetFramework)' != '$(UwpMinimum)'" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="$(PackageReadmeFile)" Pack="true" PackagePath="\" />
+  </ItemGroup>
 
 </Project>