title: How to check if internet connection was lost WP7
body: <p>How can I check if internet connection was lost in WP7.I'm developing social app and if internet connection was lost I have FileNotFoundException.I can't use try/catch because its doesn't prevent my app from closing with exception.Also <code>if (NetworkInterface.GetIsNetworkAvailable())</code> works only from time to time and not always shows the truth.</p>