A very useful introduction to Test Driven Development in .Net,
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This review is from: Test-Driven Development in Microsoft® .NET (Developer Reference) (Kindle Edition)
I found this a very useful introduction to the subject with straightforward examples that were easy to follow. At the time of reading I was just starting out with TDD and this was just what I needed. Apart from unit and integration testing the book also covers related practices such as refactoring and Customer tests.
I would also recommend Roy Osherove's "The Art of Unit Testing", his web site with video examples, and "Working Effectively with Legacy Code" by Michael Feathers.