I currently have a similar issue with VS2015. I have a solution with C ++ and C # wpf projects. A clean check, a complete build, no errors in the output, but hundreds of errors appear in the error list. This reminds me of problems with earlier versions of VS than the only solution is to close all open files, but this time it doesn't help either. In my case, deleting the .suo file helped. See This For Reference VS freaks out .
(edit) I read that Xamarin can cause a problem, but deleting it, as well as removing all other add-ons that come with VS2015, did not fix the problem. After a clean check and a complete build, I got all the errors again.
user4549552
source share