Disable noise messages in debug output windows - visual studio 2012
Right click on the Output window for the Debug selection; here you can select which types of messages to see.
The Thread Exit Messages option will be disabled in the example you gave.
You can can also get to these settings at any time by searching in the Quick Launch bar (Top Right of VS) and search for "Output Window". This will bring up the settings for the Output Window regardless of the Output Window's current context.
