This short video provides some best practices for recording web performance tests and tries to answer the following questions:
* Why is performance testing important?
* How does Visual Studio help you test the performance of your applications?
* How do you record a web performance test?
* How do make a web performance test data driven, transaction driven, loop driven, convert to code, add validations?

This video explains how to create unit tests for applications making use of the ADO.NET Entity Framework 4.1.
http://www.infoq.com/presentations/Testability-and-the-Entity-Framework

This video explains how to use Setup parameters in the Returns of a mocked function using Moq. Moq (pronounced “Mock-you” or just “Mock”) is the only mocking library for .NET developed from scratch to take full advantage of .NET 3.5 (i.e. Linq expression trees) and C# 3.0 features (i.e. lambda expressions) that make it the most productive, type-safe and refactoring-friendly mocking library available.

This video demonstrates some of the awesome new Coded UI test editing features available in Visual Studio 2010 Feature Pack 2.

This video provides a code-centric introduction to the concepts, tools, and practices of Test-driven Development (TDD) in .NET. It starts with the basics of setting up a unit testing framework and writing the first test, then it moves on to techniques for mocking dependencies and demonstrate patterns like Dependency Injection that will help you move past testing just the basics.