Internet lost connection Webbrowser - windows-phone-7

Question

I have webrowser in app. I need to do something with webrowser when the internet connection is lost e.g. display MessageBox and when internet is again available reconnect to website. I find that can i use DeviceNetworkInformation.NetworkAvailabilityChanged Event, but when I 'm testing, the event is not firing.
I tried use DeviceNetworkInformation.IsNetworkAvailable, when navigating but this not have functionality that i want. I have testing in Nokia Lumia 710.
Here my simple code, i make him from example from msdn
http://msdn.microsoft.com/en-us/library/microsoft.phone.net.networkinformation.devicenetworkinformation.networkavailabilitychanged%28v=vs.92%29.aspx
DeviceNetworkInformation.NetworkAvailabilityChanged += new EventHandler(NetworkAvailabilityChanged);
void NetworkAvailabilityChanged(object sender, NetworkNotificationEventArgs e)
{
string info = string.Empty;
bool connection = false;
bool disco = false;
switch (e.NotificationType)
{
case NetworkNotificationType.InterfaceConnected:
connection = true;
break;
case NetworkNotificationType.InterfaceDisconnected:
info = "Lost Internet";
disco=true;
break;
case NetworkNotificationType.CharacteristicUpdate:
break;
default:
break;
}
Dispatcher.BeginInvoke(() =>
{
if(disco)
MessageBox.Show(info);
if(connection)
webbrowser1.Navigate(site);
});
}
I have question i check in phone that these methods IsCellularDataEnabled, IsNetworkAvailable, IsWiFiEnabled return true. I read somewhere that event NetworkAvailabilityChanged only work when is only one type of network is enable. Is this true?

Answer 1

Please check this page it may help you http://msdn.microsoft.com/en-us/library/microsoft.phone.net.networkinformation.devicenetworkinformation.networkavailabilitychanged(v=vs.92).aspx you can take the information of disconnected from NetworkNotificationEventArgs argument as it says...