C#中练习属性使用的一个例子

属性有四个种类：可读属性（需实现get和set访问器）、只读属性（实现get访问器）、只写属性（实现set访问器）和Static属性（只能访问静态数据）参考下面这个例子：
 
//这个例子是在vs2008中实现的
 
 

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace shuxing
{
    class program
    {
        static void Main()
        {
            User zs = new User();
            User ls = new User();
            zs.Name = "张三";
            zs.Sex = "女";
            zs.Birthday = Convert.ToDateTime("1980-1-1");
            Console.WriteLine(User.LoginCount);
            Console.WriteLine("姓名：" + zs.Name + "   性别：" + zs.Sex+ "  年龄："+zs.Age);
        }
    }
    class User
    {
        private string m_Name;
        private string m_Sex;
        private DateTime m_Birthday;
        private static int m_LoginCount;
        public User()
        {
            m_LoginCount++;
        }
        public static int LoginCount    //静态只读属性
        {
            get
            {
                return m_LoginCount;
            }
        }
        public DateTime Birthday       //只写属性
        {
            set
            {
                if (value < Convert.ToDateTime("1900-1-1") || value.Year > DateTime.Now.Year - 3)
                    Console.WriteLine("用户年龄非法");
                else
                {
                    m_Birthday = value;
                }
            }
        }
        public int Age          //只读属性
        {
            get
            {
                return DateTime.Now.Year - m_Birthday.Year;
            }
        }
        public string Name      //读写属性
        {
            get
            {
                return m_Name;
            }
            set
            {
                m_Name = value;
            }
        }
        public string Sex     //读写属性
        {
            get
            {
                return m_Sex;
            }
            set
            {
                if (value == "男" || value == "女")
                {
                    m_Sex = value;
                }
                else
                {
                    Console.WriteLine("性别只能为“男”或“女”");
                }
            }
        }
     }
}
 
 

 
注：上面这个例子使用了属性，使代码更加清晰还逻辑严密。