ASP.NET MVC Preview 3 has been released, and the latest version provides a new Model-View-Controller (MVC) framework on the ASP.NET 3.5 runtime. This means that developers can design various web applications using the MVC approach. The new ASP.NET MVC framework option is very clean and easy to use. It will allow you to easily maintain separation of concerns in your application, and it helps with clean testing and Test-Driven Development (TDD).