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
Use NuGet and add the package Microsoft.AspNet.Mvc (Microsoft Asp.Net Mvc 4). This should upgrade your references. See:
https://nuget.org/packages/Microsoft.AspNet.Mvc
You will need to upgrade the assembly references in your web.config.
Remove from the root web.config:
Add to the root web.config:
Views/Web.Config:
Change Razor from 1.0.0.0 to 2.0.0.0: