类继承出错

 //sealed　class ren  //使用sealed将实现对类的密封，结果就是这个类无法被继承．密封类不能同时又是抽象类，因为抽象类总是希望被继承的。 
        public class ren
        {
            //声明基类变量
            protected int eye;
            protected int hand;


            //定义一个事件
            public delegate void RenChengHender(string s, int e);   //定义一个委托
            public event RenChengHender RenChenged;  //定义一个事件

            //构造函数
            public ren()
            {
                eye = 2;
                hand = 2;
            }
            //构造函数重载
            public ren(int e, int h)
            {
                eye = e;
                hand = h;
            }

            //属性声明

            public int Eye
            {
                get
                {
                    return eye;
                }
                set
                {
                    eye = value;
                    string s = "眼睛";
                    RenChenged(s,value);//如果修改了这个值，将激发事件
                }
            }
            public int Hand
            {
                get
                {
                    return hand;
                }
                set
                {
                    hand = value;
                    string s = "手";
                    RenChenged(s, value);
                   
                }

            }
            public string person()
            {
                return "此人共有眼睛" + Eye + "只," + "还有" + Hand + "只手！";
            }

        }

        //子类
        public class man : ren
        {
            private string sex;
            private int age;

            //构造函数重载
            public man(string sex0, int age0, int eye0)
                : base(6, 888)
            {
                sex = sex0;
                age = age0;
                eye = eye0;
            }

            //属性声明
            public string Sex
            {
                get
                {
                    return sex;
                }
                set
                {
                    sex = value;
                }

            }

            public int Age
            {
                get
                {
                    return age;
                }
                set
                {
                    age = value;
                }
            }
            //子类的新方法

            public string manp()
            {
                return "这个人的性别是：" + sex + ",年龄" + age + "有多少只手？答案：" + hand + "只！又有多少只眼睛？答案：" + eye + "只！呵呵，这里就不加判顿了";
            }

            //基类方法重载
            public string person(string s)
            {
                if (s == "男")
                    return "他是个男人！";
                else
                    return "可能是个女人，或者她根本就不是人!呵呵";
            }
            //基类方法重写
            public new string person()
            {
                if (hand != 2 || eye != 2)
                    return "不好意思，我实在不知到你为什么和正常人不一样";
                else
                { return "终于见到一个正常人了！"; }
            }
        }
        public void Page_Load(object sender, EventArgs e)
        { 
            ren p1 = new ren(55, 55);
           
            
            //首先测试基类属性与方法是否正常
            ren p0 = new ren();
            Response.Write("一个正常人应该拥有" + p0.Hand + "手，拥有" + p0.Eye + "眼睛!－－－－测试一<br/>");

               
           
            Response.Write("哇靠，它拥有" + p1.Hand + "手，拥有" + p1.Eye + "眼睛!－－－－测试二<br/>");
            Response.Write(p1.person() + "这是基类方法测试！－－－－－呵呵测试！");
            
            p1.RenChenged += new ren.RenChengHender(p1_RenChenged);  
            p1.Eye = 2;
            p1.Hand = 3;

            //子类测试

            man p2 = new man("男", 80, 3);

            Response.Write("这" + p2.Sex + "人" + p2.Age + "岁了!还在上网？－－－－测试四<br/>");

            p2.Age = 22;
            Response.Write("这" + p2.Sex + "人" + p2.Age + "岁了!可以上网，但是这个眼睛也有点问题，怎么" + p2.Eye + "只眼睛？－－－－测试五<br/>");

            p2.Eye = 2;
            Response.Write(p2.manp() + "这个男人正常！－－－－测试六");

            man p3 = new man("女", 22, 2);

            Response.Write(p3.person("女") + "这个女人飘香？<br/>");
            p3.Hand = 2;
            Response.Write(p3.person() + ",最后一个测试！<br/>");

        }

        void p1_RenChenged(string s, int e)
        {
            Response .Write ("<br/>---这是代理测试内容－－－<br/>");
            if (s == "眼睛")
                Response.Write("眼睛：");
            else
                Response.Write("手：");
            Response.Write(e+"只");
        }