private void timerLoadChat_Tick(object sender, EventArgs e) { _time--; if (_time <= 0) { if (Visible) { var cacXeDangChat = CuocGoi.EnVangVIP_DienThoai_LayCacXeDangChat(g_LinesDuocCapPhep); if (cacXeDangChat != null && cacXeDangChat.Count > 0) { SetVehiclesToGrid(cacXeDangChat); bool continueChatting = false; foreach (var xe in cacXeDangChat) { if (xe.SoHieuXe == SoHieuXeDangChat) { continueChatting = true; } } if (!continueChatting) { SoHieuXeDangChat = string.Empty; txtChatBox.Clear(); } LoadNoiDungChat(); } else { Close(); } } } }