Predefined type 'System.Object' is not defined or imported .net 4.6

Question

I\'m using MVC 5 and .net 4.6 to create a web API that my mobile app can connect too.

Whenever I build the project I get hundreds of errors telling me that I need to add

Answer 1

This wasted lot of my time. Close the visual studio. Delete the .vs folder and restart visual studio. Everything should work fine.

Usually this happens when you change branches or merge branches.