Alternativ.UserInterface.button_less_passenger_Click C# (CSharp) 메소드

        private void button_less_passenger_Click(object sender, EventArgs e)
        {
            if (passengers > 0)
            {
                PassengersCount = --passengers;
            }
            if (passengers == 0)
            {
                button_less_passenger.Enabled = false;
            }
        }