C#之域和属性－静态域和实例域

using System;  
using System.Collections.Generic;  
using System.Text;  
  
namespace Test  
{  
    public class Program  
    {  
        static void Main(string[] args)  
        {  
            //静态域访问 ：Classname.Field  
            Console.WriteLine(MyClass.j);   
            //实例域访问：Create a class objcet as 'mc', Then mc.field  
            MyClass mc = new MyClass();  
            Console.WriteLine(mc.num);  
        }  
    }  
  
    class MyClass  
    {  
        public static int x = 2, y = 3, z = 4, k, j;//静态域
        public int num = 200;//实例域  
    }  
}