Visual Studio error “Object reference not set to an instance of an object” after install of ASP.NET and Web Tools 2015

Question

After installing the ASP.NET and Web Tools 2015 (RC1 update 1) I get the following error within ASP.NET MVC 4 projects when opening *.cshtml files:

Answer 1

Maybe this helps:

1. Delete the contents from the following folders:
   1. C:\Users\%userprofile%\AppData\Local\Microsoft\VisualStudio
   2. C:\Users\%userprofile%\AppData\Local\Microsoft\VSCommon
2. Sometimes, you need to go to:
   1. [x64] C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE
   2. [x86] C:\Program Files\Microsoft Visual Studio 14.0\Common7\IDE

and run devenv /resetuserdata.

Expect, that all of your user settings such as Visual Studio layout, linked Microsoft account or start page might disappear.