The gang at Microsoft has been working on the new ASP.NET MVC -- Model-View-Controller -- framework for a while. In February they announced the MVC Framework v0.

C# Corner. ASP.NET MVC Extensibility with MEF. How to use MEF to add validation rule components to an ASP.NET MVC Web application. By Eric Vogel; 03/14/2014; The Managed Extensibility Framework (MEF) ...