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));
			}
		}
	}
}