The type 'Expression<>' is defined in an assembly that is not referenced

Question

In ASP.NET MVC 4.5.2 Framework.

after typing

@Html.LabelFor()
or 
@Html.EditorFor()

in view

I\'m getting Error: The

Answer 1

I just had the same exact issue and none of the solutions fixed the problem. I had to add this into my web.config within System.Web

I had removed it when changing some of the config around.