Linq to SQL table inheritance in ASP.net Dynamic Data

I have a Linq to SQL data model that uses single table inheritance.

I created a new ASP.net Dynamic Data web site with a开发者_StackOverflow社区ll table scaffolding enabled, but I can't see any of the derived classes in my data model being scaffolded.

Is this by design?

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Table Inheritance is possible with (unreleased) ASP.NET 4.0 using LINQ to SQL. The Dynamic Data Samples / Futures download-able here have an Inheritance.dbml file that the team created specifically to demonstrate this.

Also see the Walkthrough, which applies to Entity Framework.