I\'ve read how to use Spark View Engine instead of Webform View Engine in a Mvc2 Project so I think we can do the same with Razor View Engine but when I search on GOOGLE, I
While this is technically possible, you'll need to copy vast swaths of code from the MVC3 source.
Razor will still need .Net 4.0, so this is really not worth it; you should just upgrade to MVC3.