The type or namespace 'Mvc' does not exist in the namespace 'System.Web'

I recently installed VS.NET 2012 and moved my ASP.NET MVC 4 project over. However, on building the solution I get hundreds of errors with :

The type or namespace 'Mvc' does not exist in the namespace 'System.Web' (are you missing an assembly reference)

AFAIK ASP.NET MVC 4 is built into VS 2012 and there is nothing that needs to be installed. Any ideas how to get rid of these errors and build the application?


You need to include the reference to the assembly System.Web.Mvc in you project.

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