The Lightweight Test Automation Framework for ASP.NET was developed and is currently used by the ASP.NET QA Team to automate regression tests for the product. It is designed to run within an ASP.NET application.
Tests can be written in any .NET Framework language. They use an API to manipulate and verify the DOM of the browser. The Lightweight Test Automation Framework supports running tests in Microsoft Internet Explorer, Mozilla Firefox, Apple Safari, and Opera.

This release contains samples that show how the ASP.NET QA team creates automated tests by using the Lightweight Test Automation Framework. The release is unsupported, and is provided in the form of samples only.

You can find information on the future of the Lightweight Test Automation Framework for ASP.NET in the ASP.NET QA Roadmap and instructions on how to use the framework in the Lightweight Test Automation Framework for ASP.NET Samples Release Notes.
This is the first release of this framework; we are working to add source code for the project as soon as possible.