Entity Framework Table Per Concrete Type Inheritance: Generate through .EDMX
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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.

If that is not possible, would it be possible to generate an .EDMX through code-first and then edit that through the designer?