Web Tests in Visual Studio 2008 (screencast)
If you are interested in testing your web applications, Visual Studio offers a great way to do this without bolt-on or expensive 3rd party tools. Auto-record, configure, and even generate coded versions (C# or VB) of your web tests, then reuse with/without Load Tests. You can also add Data Sources (databases, CSV files, and XML files), Validation rules, and Extraction rules to your web tests.
Here I have provided a short screencast to demonstrate "some" of the features for creating Web Tests with Visual Studio 2008: