Program

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

namespace PersonDemo2
{
    class Program
    {
        static void Main(string[] args)
        {
          // Person p = new Person() { Name = "大圣" };
          // p.Speak("only you");

          // Stu s = new Stu();
          // //Person p = new Person() { Gender=Gender.Man, Hobby="吃鸡翅膀", Name="大圣" };
          //// s.ShowInfo();
          // s.Speak("曾经有........三个字");

           Person p = new Stu();
           p.Study();
           p.Speak("xx");

         // Stu s = new Person();

        }
    }
}

Program

原文：http://www.cnblogs.com/ken-admin/p/5825980.html