private void ItemListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
 {
     bleDeviceDisplay = ResultsListView.SelectedItem as BluetoothLEDeviceDisplay;
     if (bleDeviceDisplay != null)
     {
         PairButton.IsEnabled    = !bleDeviceDisplay.DeviceInformation.Pairing.IsPaired;
         ConnectButton.IsEnabled = ((bool?)bleDeviceDisplay.DeviceInformation.Properties["System.Devices.Aep.IsConnected"] == false) &&
                                   bleDeviceDisplay.DeviceInformation.Pairing.IsPaired;
     }
 }