New .csproj format - How to specify entire directory as “linked file” to a subdirectory?

Question

With the new .csproj format (as well as the old), it is possible to add files as linked outside of the project folder:

Answer 1

I got this working for me (linking all svg-files in an external dir to a solution-subfolder) with a hint from this site. Only the %(Parent.Filename) didn't work for me (got a CS1508), so I replaced with %(Filename)%(Extension).

    
    
        Resources\%(Filename)%(Extension)