Migrating my MVC 3 application to MVC 4

Question

I really do not know what to do, I\'m following this article that shows how to migrate my MVC 3 application manually .

I followed all the steps but

Answer 1

Reinstalling the AspNetSprite packages as suggested above does not solve the problem for me. But adding theses lines on the runtime\assemblyBinding section of the root web.config file works :