Today Vin (http://twitter.com/vinayakkamat) pointed me to LinqPad, quickly found it too good. Especially if you are a C# guy who want to query against your data in a C# way.
Here is a good demo to start with http://oreilly.com/pub/e/909
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And you can download LinqPad from here http://www.linqpad.net/
LINQPad supports everything in C# 3.0 and Framework 3.5: LINQ to SQL, LINQ to Objects, LINQ to XML
LINQPad is also a great way to learn LINQ: it comes preloaded with 200 examples
Here is a good demo to start with http://oreilly.com/pub/e/909


