<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
  <Target Name="AddNuGetDlls" BeforeTargets="_GetPackageFiles">
    <!-- Resolve the project references to get their output DLL paths -->
    <ItemGroup>
      <ResolvedProjectReference Include="@(ReferencePath)" Condition="%(ReferencePath.ReferenceSourceTarget) == 'ProjectReference'">
        <OutputPath>%(ReferencePath.OriginalItemSpec)</OutputPath>
      </ResolvedProjectReference>
 
      <!-- Add the DLL produced by the referenced project to the _PackagesToPack list -->
      <_PackagesToPack Include="@(ResolvedProjectReference->'%(OutputPath)')">
          <NuGetPackageId>@(ResolvedProjectReference->'%(AssemblyName)')</NuGetPackageId>
      </_PackagesToPack>
    </ItemGroup>
    
    <!-- Merge the collection of PackageReference and Assemblies using the NuGetPackageId key.
       This produces a new list containing the DLL path and the "IncludeInPackage" metadata-->
    <JoinItems Left="@(ResolvedCompileFileDefinitions)" LeftKey="NuGetPackageId" LeftMetadata="*" Right="@(ProjectReference)" RightKey="" RightMetadata="*" ItemSpecToUse="Left">
      <Output TaskParameter="JoinResult" ItemName="_PackagesToPack" />
    </JoinItems>
 
    <ItemGroup>
      <Message Importance="High" Text="Adding DLLs from the following packages: @(_PackagesToPack->'%(NuGetPackageId)')" />
 
      <!-- Remove NETStandard DLLs -->
      <_PackagesToPack Remove="@(_PackagesToPack)" Condition="%(NuGetPackageId) == 'NETStandard.Library'" />
      <_PackagesToPack Remove="@(_PackagesToPack)" Condition="%(_PackagesToPack.IncludeInPackage) != 'true'" />
    </ItemGroup>
 
    <Message Importance="High" Text="Adding DLLs from the following packages: @(ResolvedProjectReferences->'%(OutputPath)%(AssemblyName).dll')" />
 
    <ItemGroup>
      <!-- Update the collection of items to pack with the DLLs from the NuGet packages -->
      <None Include="@(_PackagesToPack)" Pack="true" PackagePath="build" Visible="false" />
 
      <!-- Add the DLL produced by the current project to the NuGet package -->
      <None Include="$(OutputPath)\$(AssemblyName).dll" Pack="true" PackagePath="build" Visible="false" />
    </ItemGroup>
  </Target>
 
</Project>