Visual Studio 2015 Broken Razor Intellisense

Question

After installing and then repairing my VS2015 instance I still cannot get intellisense (server side) to work in my MVC views. I get alerted by message promp

Answer 1

There is another solution, without reset all user data

(but only window layouts/toolbars):

close all VS2015 instances, [eventually backup, and] delete the folder:

"[User Directory]\AppData\Roaming\Microsoft\Visual Studio\14.0"

Now, re-open VS2015: layout was reset to factory preset, but Razor syntax would work