职责链模式c#（处理车）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 职责链模式
{
    public interface ICarHandler
    {
        ICarHandler next { get; set; }
        ICarHandler setNextCanHandler(ICarHandler handler);
        void HandlerCar();
    }

public class ACarHander : ICarHandler
    {
      
        public ICarHandler next { get; set; }

public ICarHandler setNextCanHandler(ICarHandler handler)
        {
            this.next = handler;
            return this.next;
        }

public void HandlerCar()
        {
            Console.WriteLine("处理车头");
            this.next.HandlerCar();
        }
    }
    public class BCarHander : ICarHandler
    {

public ICarHandler next { get; set; }

public ICarHandler setNextCanHandler(ICarHandler handler)
        {
            this.next = handler;
            return this.next;
        }

public void HandlerCar()
        {
            Console.WriteLine("处理车身");
            this.next.HandlerCar();
        }
    }
    public class CCarHander : ICarHandler
    {

public ICarHandler next { get; set; }

public ICarHandler setNextCanHandler(ICarHandler handler)
        {
            this.next = handler;
            return this.next;
        }

public void HandlerCar()
        {
            Console.WriteLine("处理车尾");
            this.next.HandlerCar();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            ICarHandler c1=new ACarHander();
            ICarHandler c2=new BCarHander();
            ICarHandler c3=new CCarHander();
            c1.setNextCanHandler(c2).setNextCanHandler(c3);
            c1.HandlerCar();
            Console.ReadKey();
        }
    }
}