If you do any work with LINQ, you have to go out and buy the LINQ Pocket Reference by Joseph and Ben Albahari, ISBN 978-0-596-51924-7, O’Reilly. It’s a tiny, 160 page book that will literally fit into the back pocket of your jeans. I love it, use it whenever I’m doing LINQ stuff. It’s a permanent fixture on my desk and in my laptop bag. Just go buy it, now! It’s $10.19 at Amazon. If you program for .NET, there is no excuse to NOT own this book. Skip lunch today if you need to budget for the money.