Directory.Build.props

<Project>
    <PropertyGroup>
        <LangVersion>preview</LangVersion>
        <ImplicitUsings>enable</ImplicitUsings>
        <Nullable>enable</Nullable>
    </PropertyGroup>
    <ItemGroup>
        <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.435">
			<PrivateAssets>all</PrivateAssets>
			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
		</PackageReference>
    </ItemGroup>

  <Target Name="AddInternalsVisibleTo" BeforeTargets="BeforeCompile">
    <!-- Add default suffix if there is no InternalsVisibleTo or InternalsVisibleToSuffix defined -->
    <ItemGroup Condition="@(InternalsVisibleToSuffix->Count()) == 0 AND @(InternalsVisibleTo->Count()) == 0">
      <InternalsVisibleToSuffix Include=".Tests" />
    </ItemGroup>

    <!-- Handle InternalsVisibleTo -->
    <ItemGroup Condition="'@(InternalsVisibleTo->Count())' &gt; 0">
      <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
        <_Parameter1>%(InternalsVisibleTo.Identity)</_Parameter1>
      </AssemblyAttribute>
    </ItemGroup>

    <!-- Handle InternalsVisibleToSuffix -->
    <ItemGroup Condition="@(InternalsVisibleToSuffix->Count()) &gt; 0">
      <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
        <_Parameter1>$(AssemblyName)%(InternalsVisibleToSuffix.Identity)</_Parameter1>
      </AssemblyAttribute>
    </ItemGroup>
  </Target>
</Project>