I will go into some of the newer features of C# 3.0 specifically those that are involved with LINQ.
On July 25th and 26th the BSDA will be hosting an event called LINQ Bootcamp where presenters will go through the book “Programming Microsoft LINQ” chapter by chapter (1 – 12). It will be a fun weekend and a great chance to get your feet wet with LINQ.
If you don’t think you will be able to make it to the event I would still check out the book.

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LINQ
linq, asp.net, extension methods