{
        int a = 9;    //给变量a赋值为9
        int b = a;   //将a的副本给变量b
        b = 10;
        Console.WriteLine(string.Format(\"a={0},b={1}\", a, b));
        Person ZS = newPerson();       //张三
        ZS.Age = 99;           //张三的年龄是99
        Person SM = ZS;        //三毛等于张三，即张三和三毛就是同一个人
        SM.Age = 100;      //三毛年龄变成100,张三也就变成了100
       Console.WriteLine(string.Format(\"A={0},B={1}\", ZS.Age, SM.Age));
        Console.ReadKey();

    }

}
classPerson
{
    publicint Age { get; set; }
}