[C#] Action 복습

            Action action = () => { Console.WriteLine("단일로 실행이 될까?"); };
            action();

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            Action<string> action = (input) => { Console.WriteLine(input); };
            action("하나의 매개변수");

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            Action<string, int> action = (age, number) => { Console.WriteLine("{0}:{1}", age, number); };
            action("나이", 99);

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            Action<int, int, int> sum = (a, b, c) => { Console.WriteLine(a + b + c); };
            sum(10, 20, 30);

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        public App()
        {
            Sum((a, b) => { Console.WriteLine(a + b); }); 
        }

        void Sum(Action<int, int> callback)
        {
            callback(10, 20);
        }

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    class App
    {
        public App()
        {
            PlayerInfo((Player player) => { Console.WriteLine("ID: {0}, 이름:{1}", player.id, player.name); }); 
        }

        void PlayerInfo(Action<Player> callback)
        {
            callback(new Player(10001, "홍길동"));
        }
    }

    class Player
    {
        public int id;
        public string name;

        public Player(int id, string name)
        {
            this.id = id;
            this.name = name;
        }
    }