using System;

namespace Test1
{
    class Person
    {

        //字段
        int id;//编号
        string name;//姓名
        int age;    //年龄

        //构造函数
        /// <summary>
        /// 1，空参构造函数
        /// </summary>
        public void Person() { }

        /// <summary>
        /// 2，全参构造函数
        /// </summary>
        /// <param name="id">编号</param>
        /// <param name="name">姓名</param>
        /// <param name="age">年龄</param>
        public void Person(int id, string name, int age)
        {
            this.id = id;
            this.name = name;
            this.age = age;
        }


        //封装字段
        /// <summary>
        /// 1，编号【PK】
        /// </summary>
        public int Id
        {
            get { return id; }
            set { id = value; }
        }
        /// <summary>
        /// 姓名
        /// </summary>
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        /// <summary>
        /// 年龄
        /// </summary>
        public int Age
        {
            get { return age; }
            set { age = value; }
        }
    }
}

using System;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            //实例化人类（对象）【通过关键字“new”】
            Person p = new Person();
            
            //赋值
            p.Id = 10000;
            p.Name = "小明";
            p.Age = 3;
                        
            Console.WriteLine("编号：{0}",p.Id);
            Console.WriteLine("姓名：{0}",p.Name);
            Console.WriteLine("年龄：{0}",p.Age);

            Console.Read();
        }
    }
}