csharp-sdk-upm/Sample/LeanEngineApp/LeanEngineApp.csproj

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

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <ReleaseVersion>0.6.4</ReleaseVersion>
  </PropertyGroup>


  <ItemGroup>
    <Folder Include="LeanEngine\" />
  </ItemGroup>
</Project>