属性

 

 

 

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

namespace AttributeDemo
{
    /// <summary>
    /// 属性的继承和覆盖
    /// 编译器实际上就是把属性生成方法,所以可以把属性理解为方法
    /// </summary>
    class Test
    {
        static void Main(string[] args)
        {
            BaseClass b1 = new BaseClass();
            DerivedClass b2 = new DerivedClass();

            b1.Name = "Mary";
            b2.Name = "John";

            b1.Id = "Mary123";
            b2.Id = "John123";

            Console.WriteLine("Base:{0},{1}", b1.Name, b1.Id);
            Console.WriteLine("Derived:{0},{1}", b2.Name, b2.Id);
            Console.ReadKey();
            //结果是: Base: Name-BaseClass,ID-BaseClass
            //        Derived: John,ID-BaseClass
            //如果将new private string id 改为new public string Id
            //结果是: Derived: John,John123
        }
    }
    class DerivedClass : BaseClass
    {
        private string name = "Name-DerivedClass";
        private string id = "ID-DerivedClass";

        new public string Name
        {
            get { return name; }
            set { name = value; }
        }
        //注意private
        new private string Id
        {
            get { return id; }
            set { id = value; }
        }
    }
    public class BaseClass
    {
        private string name = "Name-BaseClass";

        public string Name
        {
            get { return name; }
            set { }
        }

        private string id = "ID-BaseClass";

        public string Id
        {
            get { return id; }
            set { }
        }
    }
}