private void typeComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
this.seatComboBox.Items.Clear();
this.seatComboBox.Items.Add(ticket.Seat.Number.ToString());
string[] freeSeats =
seatService.GetFreeSeatsForScreening(ticket.ScreeningId, ticket.Screening.AuditoriumId)
.Select(n => n.ToString())
.ToArray();
this.seatComboBox.Items.AddRange(freeSeats);
}
