问Wp7:等待用户交互

EN

class Car
{
    private int _fuel;
    public int Fuel
    {
        get { return _fuel;}
        set
        {
            if(_fuel != value)
            {
                _fuel = value;
                var t = TankEmpty;
                if(t != null)
                {
                    t(this, EventArgs.Empty);
                }
            }
        }
     }

     public event EventHandler TankEmpty; 
}


class Driver
{
    private Car _car;

    Driver(Car car)
    {
        _car = car;
        _car.TankEmpty += Car_TankEmpty;
    }

    private void CarTank_Empty(object sender, EventArgs e)
    {
        //Push Car
    }
}