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

In my case (not necessarily be the solution for you, but it may be helpful for someone), the solution was:

1. Go menu Tools → Extensions and Updates

2. Select the Online tab from the right panel

3. Search for the words web tools, and then select Microsoft ASP.NET and Web Tools and install it.

In my case, this was missing from my computer because of a lot of repairing operations for Visual Studio.