TestAppSimple.csproj

<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), testAsset.props))\testAsset.props" />

  <PropertyGroup>
    <TargetFramework>$(CurrentTargetFramework)</TargetFramework>
    <OutputType>Exe</OutputType>
  </PropertyGroup>
</Project>