MSBuildAppWithMultipleFrameworks.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), testAsset.props))\testAsset.props" />

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFrameworks>net451;$(CurrentTargetFramework)</TargetFrameworks>
  </PropertyGroup>

</Project>