private void RouteButton_Click(object sender, System.Windows.RoutedEventArgs e)
 {
     myDrawObject.IsEnabled = false;
     routing.Optimization   = RouteOptimization.MinimizeTime;
     routing.TrafficUsage   = TrafficUsage.None;
     routing.TravelMode     = TravelMode.Driving;
     routing.Route(GraphicsToMapPoints(), Route_Complete);
 }