面向对象

class Person2
        {
            public int Age
            {
                get//这是只读的
                {
                }
            }

class Person
        {
            public int Age
            {
                get;
                set;
            }
        }

        class Person
        {
            public int Age;
            public string Name;
            private string Nickname;

            public void GiveNn(string nickname)
            {
                if (nickname == "Dogegg")
                {
                    return;
                }
                this.Nickname = nickname;
            }