LINQ to SQL is more stable and bug-free than most Microsoft version 1 products, but data-oriented .NET developers com-­plain the free O/RM tool doesn't offer the Entity Framework (EF) capability to ...

Language Integrated Query (LINQ) for .NET and its System.Query, System.Data.DLink, and System.Xml.XLink classes enable relational-to-object and XML-to-object mapping with first-class CLR data types.

So I'm playing around with Visual Studio 2010 while we think about moving our projects to it, and I was trying to make a new Silverlight 4 app, but when I go to add any kind of of data models (ADO, ...