title: Predefined type 'System.Object' is not defined or imported [dnxcore50]
body: <p>Today, my project full of these errors. Same with "string", "int", etc. I am running the latest VS Code on Yosemite.  Uninstalled and reinstalled DNVM.  Deleted all packages from .dnx.  I can run my program, but this is really bothering me.</p>