private void btnSearchGuest_Click(object sender, System.EventArgs e)
 {
     try
     {
         frmLst_Guests afrmLst_Guests = new frmLst_Guests(this);
         afrmLst_Guests.Show();
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmTsk_BookingHall_Group.btnSearchGuest_Click\n" + ex.ToString(), "Thông báo", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }
 private void barButtonItem18_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     frmLst_Guests afrmLst_Guests = new frmLst_Guests();
     afrmLst_Guests.Show();
 }