MVC 5 -> MVC 5.1 Migration. Intellisense issues

Question

I just updated my project to MVC 5.1 from MVC 5. The main web.config file got updated automatically, but web.configs under main View and Areas folders weren\'t

Answer 1

Update NuGet Packages in Package Manager Console.

Verify the current version of System.web.MVC and update it in the Views/Web.config file and also verify the version in Web.config of Root folder.