访问者模式

using System;
using System.Collections;
using System.Collections.Generic;

abstract class Action
{
    public abstract void GetManConclusion(Man man);
    public abstract void GetWomanConclusion(Woman woman);
}

class Success:Action
{
    public override void GetManConclusion(Man man)
    {
        Console.WriteLine("{0}{1}时，背后多半有一个伟大的女人。", man.GetType().Name, this.GetType().Name);
    }
    
    public override void GetWomanConclusion(Woman woman)
    {
        Console.WriteLine("{0}{1}时，背后多半有一个伟大的女人。", woman.GetType().Name, this.GetType().Name);
    }
}



abstract class Person
{
    public abstract void Accept(Action action);
}

class Woman:Person
{
    public override void Accept(Action action)
    {
        action.GetWomanConclusion(this);
    }
}
class Man:Person
{
    public override void Accept(Action action)
    {
        action.GetManConclusion(this);
    }
}

class ObjectStructure
{
    private IList<Person> elements=new List<Person>();
    
    public void Add(Person element)
    {
        elements.Add(element);
    }
    
    public void Detach(Person element)
    {
        elements.Remove(element);
    }
    
    public void Display(Action voisitor)
    {
        foreach(Person e in elements)
        {
            e.Accept(voisitor);
        }
    }
}



public class MyClass
{
    public static void Main()
    {
        ObjectStructure o=new ObjectStructure();
        o.Add(new Man());
        
        Success v1=new Success();
        o.Display(v1);
        
        Console.ReadLine();
    }
}