Understanding ADO.NET Orcas
If you're like me and enjoy diving into a technology before reading the manual, then you may have experienced confusion when working with the version of ADO.NET Orcas (formerly ADO.NET vNext).
I've been playing with the March CTP of Orcas for a couple of days now, and I finally believe that I have the different ADO.NET features sorted out. I was planning to write my own post to summarize the different new query technologies that are provided, until I found Julie Lerman's entry on the same topic. I may add details later, but her post is a great place to start.
Sorting out LINQ and Entity Framework for Data Access