private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e) { App app = Application.Current as App; string deviceID = app.DivceID; this.image4.Source = new BitmapImage(new Uri("Images/" + deviceID + ".jpg", UriKind.Relative)); sc.FindChatByDIDCompleted += new EventHandler <FindChatByDIDCompletedEventArgs>(sc_FindChatByDIDCompleted); sc.FindChatByDIDAsync(deviceID); }