在屏幕上显示学生的信息

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

namespace @class
{
    class Program
    {
        static void Main(string[] args)
        {
            student no = new student();
            student Yangyanjie = new student( "001", "杨艳杰", "女", 20);
            Console.BackgroundColor = ConsoleColor.DarkGreen;
            System.Console.WriteLine(Yangyanjie.Showstudent());
            Console.ReadKey();
        }
    }
    public class student
    {
        public String id;
        public String name;
        public String sex;
        int age = 20;

        public student()//与类同名的方法，为构建函数生成时自动调用，默认的构建函数，用于对象的初始化
        {
            id = "001";
            name = "无";
            sex = "女";
            age = 20;
        }

       public student(String inid, String innanme, String insex, int inage)//多态
        {
            id = inid;
            name = innanme;
            sex = insex;
            age = inage;
        }

        public String Showstudent()
        {
            return ("序号："+id +"   名字：" + name + "   性别："+sex +"    年龄："+age );
        }

    }
}

            输出结果：