mono/MonoGame — pull request #2175 by ischyrus (2013-12-30 02:20:23+00:00)
Title: Adding support for Exit() in metro apps.

It appears that the Exit() method is not implemented for metro apps. Currently, even after Exit() is called the game continues to Tick and Update\Draw calls continue.

Disposing doesn't work because Ticks continue to happen.

This change stops the ticks and allows the game to be disposed.