private void Back_Click(object sender, EventArgs e)
        {
            Reserveerschem2Tickets nextForm = new Reserveerschem2Tickets();

            this.Hide();
            nextForm.ShowDialog();
            this.Close();
        }
        private void Next_Click(object sender, EventArgs e)
        {
            if (cbTime.SelectedIndex > -1)
            {
                Program._ReservationSession.CurrentReservation.AddPlaceDateTime(cbDate.Text, cbTime.Text);

                Reserveerschem2Tickets nextForm = new Reserveerschem2Tickets();
                this.Hide();
                nextForm.ShowDialog();
                this.Close();
            }
            else
            {
                MessageBox.Show("Zorg aub dat u alles geselecteerd heeft.");
            }
        }