After yesterday\'s Windows Update, I seem to have issues building my projects.
Related Windows Updates could be: ASP.NET MVC 2.0: KB2993939 ASP.NET MVC 3.0:
I have same problem today after windows update. There is my solution.
Install-Package Microsoft.AspNet.Mvc -Version 5.2.0.0 -Project PROJECTNAME
Also you can try use these code maybe it helps.
Uninstall-Package Microsoft.AspNet.Mvc -Force
Goodluck.