一个有趣的例子：）关于delegate

namespace DelegatesCS
{
using System;
public class Wisdom //包含代理的类
{
public delegate string GiveAdvice();
public string OfferAdvice(GiveAdvice s)
{
return Words();
}
}
public class Parent //基类
{
public virtual string Advice()
{
return("Listen to reason");
}
~Parent() {}
}
public class Dad: Parent //子类
{
public Dad() {}
public override string Advice()
{
return("Listen to your Mom");
}
~Dad() {}
}
public class Mom: Parent //子类
{
public Mom() {}
public override string Advice()
{
return("Listen to your Dad");