I\'m following a video tutorial where I\'m required to create an empty ASP.NET Web Application with MVC, using Visual Studio 2015, bei
Try clearing the ComponentModelCache, the cache will rebuild next time VS is launched.
[your users name] \AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache14.0 is for visual studio 2015. This will work for other versions also.