Target which adds ProjectReference or PackageReference on a condition

[oruchreis]

Hi,
I'm trying to add ProjectReference or PackageReference on a condition with a target. I have csproj files including these:

<CustomReference Include="Package1" />
<CustomReference Include="Package2" />

The condition property is set in Directory.Build.props:

<PropertyGroup>
  <UseLocalNuGetProjects Condition="'$(UseLocalNuGetProjects)' == ''">true</UseLocalNuGetProjects>

And the target is implemented in Directory.Build.targets :

<Project>
  <Target Name="ResolveCustomeReferences"  BeforeTargets="BeforeBuild;ResolveReferences">
    <ItemGroup Condition="'@(CustomReference.Identity)' != ''">
      <MSBuild Projects="$(MSBuildThisFileDirectory)Libraries/%(CustomReference.Identity)/%(CustomReference.Identity).csproj" 
               Targets="Restore;Build" Condition="'$(UseLocalNuGetProjects)' == 'true'" />
      <ProjectReference Include="$(MSBuildThisFileDirectory)Libraries/%(CustomReference.Identity)/%(CustomReference.Identity).csproj"
                        Condition="'$(UseLocalNuGetProjects)' == 'true'" IncludeAssets="all" />      
      <PackageReference Include="@(CustomReference)"
                        Condition="'$(UseLocalNuGetProjects)' != 'true'" /><!-- I have also Directory.Packages.props so I don't need version in PackageReference in the target. -->
    </ItemGroup>
  </Target>
</Project>

I have 2 problem with this approach:

1. The build is working if the project doesn't use transitive nuget packages in the referenced project with ProjectReference. If the project uses nuget packages included in the referenced project with ProjectReference, then build fails. Normally, if we set ProjectReference statically in the csproj, we can use transitive nuget packages in that reference, but I couldn't overcome the unresolved nuget package errors with above dynamically added ProjectReference.
2. The intellisense and solution explorer doesn't see the ProjectReference nor PackageReference according to UseLocalNuGetProjects property.

How can I solve these two problems?

By the way I've tried many targets in BeforeTargets like ResolveProjectReferencesDesignTime2, CompileDesignTime, ResolveProjectReferences, ResolvePackageDependencies, Compile, etc, but no luck.

Best Regards.