Prevent exceptions messages containing { and } (COMException does) from hiding the real error

Discovered this problem when trying to execute the Example on my VS2013 with WP8 installed.

The current code throws a System.FormatException because the _real_ problem in my case is a COMException.

COMExceptions contain {CLASSID} and this messes up the calls to String.Format.

The proposed fix ensures that the error message is displayed, making debuggin and fix much easier.

Regards,

Espen@albrektsen.net