How can I run some code when a SilverLight OOB Application is uninstalled?

Is there any way to add some code to fire when an OOB silverlight app is uninstalled? I would like to fire something to my 开发者_如何学JAVAwebservice when a user uninstalls the app, is this possible?

I have found out that you can handle the "InstallStateChanged" event on the App.xaml. With this you can check the InstallState and do something based on that.