aspnetcore/src/Middleware/StaticFiles/test/UnitTests/Microsoft.AspNetCore.StaticFiles.Tests.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Content Include="SubFolder\**\*;TestDocument.txt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
    </Content>
  </ItemGroup>

  <ItemGroup>
    <Reference Include="Microsoft.AspNetCore.StaticFiles" />
    <Reference Include="Microsoft.AspNetCore.TestHost" />
  </ItemGroup>

</Project>