C#事件-1

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace Wrox.ProCSarp.Delegates{public class CarInfoEventArgs:EventArgs{public CarInfoEventArgs(string car){this.Car = car;}public string Car {get; private set;}}public class CarDealer{public event EventHandler<CarInfoEventArgs> NewCarInfo;public void NewCar(string car){Console.WriteLine ("CarDealer, new car{0}", car);RaiseNewCarInfo(car);}protected virtual void RaiseNewCarInfo(string car){EventHandler<CarInfoEventArgs> newCarInfo = NewCarInfo;if (newCarInfo != null){newCarInfo(this, new CarInfoEventArgs(car));}}}}