using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace _02面向对象{    class Program    {        static void Main(string[] args)        {            //Person p = new Person();            //p.Name = "小王";            //p.Age = 19;            //p.Gender = '男';            //p.SayHello();            for (int i = 0; i < 1000000; i++)            {                Console.WriteLine(i);            }                Console.ReadKey();        }    }}

 

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace _02面向对象{    // 首先特征：字段    // 行为：方法    class Person    {        private string name;        int age;        // ctrl + r + e快速得到字段对应的属性        char gender;        public void SayHello()        {            Console.WriteLine("大家好，我叫{0}，今年{1}岁了，我是{2}生", name, age, gender);        }        public string Name        {            get { return name; }            set { name = value; }        }        public int Age        {            get { return age; }            set { age = value; }        }        public char Gender        {            get { return gender; }            set { gender = value; }        }    }}