Visual Studio - Designer process terminated unexpectedly

Question

After opening project (new or old) Visual Studio shows warning \"Designer terminated unexpectedly\" (can see in the picture below). What could cause this error? And

Answer 1

In my case it was the problem with using system brushes as ThemeResource. Yes this is apparently a bug like other odd bugs in MS products. So I had to comment out them until I finished my project. I don't know, maybe another factor such as my graphic hardware was not ineffective but this does not exonerate MS.