Visual Studio 2013 IntelliSense stops working for ASP.NET MVC5 Controllers

Question

I am facing a weird problem in my Visual Studio 2013 ASP.NET MVC 5 project. All of a sudden, the IntelliSense in the Controller classes of the MVC 5 project are not working

Answer 1

I have found that if the build fails then the Intellisense seems to break. After fixing my build errors and rebuilding the project the Intellisense will work after reloading the particular Razor file.