assets/samples/Samples/ImportExport/CS/ImportExport.csproj

<Project Sdk="">
  <PropertyGroup>
    <RootNamespace>Revit.SDK.Samples.ImportExport.CS</RootNamespace>
  </PropertyGroup>
  <Import Project="$(SolutionDir)VSProps\SDKSamples.props" />
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
    <DocumentationFile>bin\Debug\ImportExport.XML</DocumentationFile>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
  </PropertyGroup>
  <ItemGroup>
    <Compile Remove="Export\ExportDWGOptionsData.cs" />
  </ItemGroup>
  <Import Project="$(SolutionDir)VSProps\SDKSamples.targets" />
  <PropertyGroup>
    <PostBuildEvent>set FILEFORSAMPLEREG="$(SolutionDir)..\..\..\..\Regression\API\SDKSamples\UpdateSampleDllForRegression.py"
if exist %25FILEFORSAMPLEREG%25 py -3 %25FILEFORSAMPLEREG%25  "$(ProjectPath)" "$(TargetPath)" "$(SolutionDir)"</PostBuildEvent>
  </PropertyGroup>
  <PropertyGroup>
    <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
  </PropertyGroup>
</Project>