//修饰符 返回值类型 operator 可重载的运算符（参数列表）public static Student operator +(Student a, Student b){  //方法体；} 

using System;
namespace _6_2_1运算符重载{    class Program    {        static void Main(string[] args)        {            Student st1 = new Student();            Student st2 = new Student();            Student st3 = new Student();
            st1._acore = 40;            st2._acore = 50;
            Console.WriteLine("st1和st2成绩是否相同:" + (st1 == st2));            Console.WriteLine("st1和st2成绩是否相同:" + (st1 != st2));
            Console.WriteLine("运算前成绩：{0},{1},{2}", st1._acore, st2._acore, st3._acore);
            //对象相加            st3 = st1 + st2;            //编译器自动重载+=            st1 += st2;
            Console.WriteLine("运算后成绩：{0},{1},{2}",st1._acore,st2._acore,st3._acore);                     
            Console.ReadKey();        }         
    }
    class Student    {        private int acore;
        public int _acore {            get { return acore; }            set { acore = value; }        }
        //+重载： 对象加法，求得学生成绩和        public static Student operator +(Student b, Student c)        {            Student stu = new Student();            stu.acore = b.acore + c.acore;
            return stu;        }
        //当重载==时，必须重载！=，否则编译报错        public static bool operator ==(Student b , Student c)        {            bool result = false;            if(b.acore == c.acore)            {                result = true;            }            return result;        }
        public static bool operator !=(Student b, Student c)        {            bool result = false;            if (b.acore != c.acore)            {                result = true;            }            return result;        }

    }}