Directory.Build.targets

<Project>
  <!-- Test-specific packages are imported only for test projects. -->
  <ItemGroup Condition=" '$(IsTestProject)' == 'true' ">
    <PackageReference Include="Microsoft.NET.Test.Sdk" />
    <PackageReference Include="xunit.core"  />
    <PackageReference Include="xunit.analyzers" />
    <PackageReference Include="xunit.assert" />
    <PackageReference Include="xunit.runner.visualstudio" />
  </ItemGroup>
</Project>