C#对象初始化器

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

namespace 对象初始化器
{
    class Program
    {
        static void Main(string[] args)
        {
            //第二种初始化
            var s1 = new student("张三",23);
            Console.WriteLine(s1.ToString());

            //第一种初始化
            var s2 = new student { name = "李四", age = 34 };
            Console.WriteLine(s2.ToString());

            //第三种
            var s3 = new student("王五",30) { ID=1};
        }
    }
    public class student
    {
        public string name { set; get; }
        public int age { set; get; }
        public int ID { set;get;}

        //第一种构造函数
        public student()
        {
        }

        //第二种构造函数
        public student(string Name, int Age)
        {
            name = Name;
            age = Age;
        }
        //方法重载
        public override string ToString()
        {
            return name + ":" + age.ToString(); 
        }
    }
}