private void libBookingID_SelectedIndexChanged(object sender, EventArgs e)
{
libDemoNumber.Items.Clear();
List <string> demonumbers = new List <string>();
int bookingIdSelected = Convert.ToInt32(libBookingID.SelectedItem.ToString());
demonumbers = CC.GetDemoNumbersByBooking(bookingIdSelected);
foreach (string s in demonumbers)
{
libDemoNumber.Items.Add(s);
}
}
