title: Entity Framework Table Per Concrete Type Inheritance: Generate through .EDMX
body: <p>Can you generate a TPC inheritance structure through the entity framework designer? I have managed to get a TPC inheritance structure to work through Code First, but the database I'm connecting to has a good 20 relationship tables. I don't want to manage all of those relationships through code first.</p>
  
  <p>If that is not possible, would it be possible to generate an .EDMX through code-first and then edit that through the designer?</p>