static void Main(string[] args)
{
LightControl ctrl = new LightControl(new OnState());
ctrl.PressSwich();
ctrl.PressSwich();
ctrl.PressSwich();
ctrl.PressSwich();
Console.ReadKey();
}
public void PressSwich(LightControl lightctrl)
{
Console.WriteLine("Turn off the light.");
lightctrl.State = new CloseState();
}