using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 继承{    public class Person    {        //字段        private string _name;        private int _age;        private char _gender;        //属性        public string Name        {            get { return _name; }            set { _name = value; }        }        public int Age        {            get { return _age; }            set { _age = value; }        }        public char Gender        {            get { return _gender; }            set { _gender = value; }        }        //方法        public void Say()        {            Console.WriteLine                ("我是"+this.Name+"，我"+this.Age+"岁了"+"，我是"+this.Gender+"性，我会吃喝拉撒睡");        }    }    public class Student : Person  //Student继承Person    {        private int _id;        public int Id        {            get { return _id; }            set { _id = value; }        }        public void Study()        {            Console.WriteLine("我会学习");        }    }    public class Teacher : Student  //Teacher继承Student    {        private decimal _salaray;        public decimal Salaray        {            get { return _salaray; }            set { _salaray = value; }        }        public void Teach()        {            Console.WriteLine("我会教课");        }    }    public class Professor : Teacher  //Professor继承Teacher    {        private int _teachTime;        public int TeachTime        {            get { return _teachTime; }            set { _teachTime = value; }        }        public void Profess()        {            Console.WriteLine("我是教授");        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 继承{    class Program    {        static void Main(string[] args)        {            //Person类            Person pp = new Person();            pp.Name = "人";            pp.Age = 0;            pp.Gender='无';            pp.Say(); 　　　　　　　 　　　　　　　 //Student类继承了Person类的所有属性和方法            Student s = new Student();            s.Name = "张三";            s.Age = 18;            s.Gender = '男';            s.Id = 1001;            s.Say();            s.Study();           　　　　　　　 //Teacher类继承了Person和Student类的所有属性和方法            Teacher t = new Teacher();            t.Name = "李四";            t.Age = 25;            t.Gender = '女';            t.Id = 2001;            t.Say();            t.Study();            t.Salaray = 5000.00M;            t.Teach(); 　　　　　　　 　　　　　　　 //Driver类继承了Person和Student和Teacher类的所有属性和方法            Professor p = new Professor();            p.Name = "王五";            p.Age = 35;            p.Gender = '男';            p.Id = 3001;            p.Say();            p.Study();            p.Salaray = 10000.00M;            p.Teach();            p.TeachTime = 3;            p.Profess();　　　　　　　　 　　　　　　　             Console.ReadLine();        }           }}