The Operation could not be completed: Invalid Pointer

I was having this problem briefly, I immediately came to this thread and renaming the solution did not work for me. However, once I restarted visual studios and reopened the issue went away (and has not come back since).

Close Visual Studio Delete %LocalAppData%\Microsoft\VisualStudio\14.0\ComponentModelCache Re-open Visual Studio

This is an old thread but the same symptom has come back but based on a new cause. I got the error after installing ASP.NET 5 RC1. I solved the problem by deleting this folder:

Users\{yourusername}\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache

(or %LocalAppData%\Microsoft\VisualStudio\14.0\ComponentModelCache), and afterwards restarted Visual Studio.