How to cancel the closing of your Silverlight application (in-browser and out-of-browser)

It’s almost two years ago when I wrote about the concept of canceling the the closing of a Silverlight application. In that era I was only trying to solve the problems that exist inside the browser. Like someone who accidently closes the tab, or types a new url in the tab of the Silverlight application. These things aren’t always a problem, but in Line of Business applications you would at least