C#类中字段，属性与方法

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

namespace ClassLibrary1
{
    class Person
    {
        //这里是字段用来存储数据,private可写可不写
        private string _name;
         int _age;
         char _gender;

        //这里是属性，本身没值，用于给字段赋值与取值时的方法，但不能称之为方法
         public string Name
         {
             get { return _name; }
             set { _name = value; }
         }


         public int Age
         {
             //取值时进行判断
             get
             {
                 if (_age < 0 || _age > 100)
                 {
                     return _age = 0;
                 }
                 return _age;
             }
             set { _age = value; }
         }

         public char Gender
         {
             get { return _gender; }
             //赋值时进行判断
             set {
                 if (value != ‘男‘ && value != ‘女‘)
                 {
                     value = ‘男‘;
                 }
                 _gender = value;
             }
         }


        public void XingWei()
        {
            Console.WriteLine("姓名：{0},年龄:{1},性别:{2}", this.Name, this.Age, this.Gender);
        }

    }
}

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

namespace ClassLibrary1
{
    public class Class1
    {
        static void Main(string[] arr)
        {
            Person xinRen = new Person();
            xinRen.Name = "张飞";
            xinRen.Age = 190;
            xinRen.Gender = ‘春‘;
            xinRen.XingWei();
            Console.ReadKey();
        }


    }
}