private void CopyLink_OnClick(object sender, RoutedEventArgs e)
 {
     try
     {
         Clipboard.SetText(Interaction.VidyoRoomUrl + "&guestName=" + HttpUtility.UrlEncode(GuestName.Trim()));
         GuestName = "";
     }
     catch (Exception ex)
     {
         Console.WriteLine(ex);
         Trace.Main.exception(ex);
     }
 }