public override bool OnBackPressed()
        {
            if (WebPopUp.Visibility == Visibility.Visible)
            {
                WebPopUp.HidePopUp();
                return(true);
            }
            else if (PlayerPopUp.Visibility == Visibility.Visible)
            {
                PlayerPopUp.HidePopUp();
                return(true);
            }

            return(false);
        }
 private void Image_Tapped(object sender, TappedRoutedEventArgs e)
 {
     if (sender is FrameworkElement fElem)
     {
         if (fElem.DataContext is ChatMessageViewModel message)
         {
             if (message.MessageType == MessageTypes.Photo && !string.IsNullOrEmpty(message.MessageAditionalData))
             {
                 WebPopUp.RequestPage(DataSource.requestUriString + message.MessageAditionalData);
             }
             else if (message.MessageType == MessageTypes.Video &&
                      !string.IsNullOrEmpty(message.MessageAditionalData))
             {
                 PlayerPopUp.RequestVideo(message.MessageAditionalData);
             }
         }
     }
 }