委托，Lambda,事件

委托

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声明委托

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Action和Func
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Lambda

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事件及事件的应用
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 class Program
    {

        static void Main(string[] args)
        {
            
            Cat cat = new Cat("汤姆", 50);
            Mouse mouse1 = new Mouse("杰瑞", 10,cat);
            Mouse mouse2 = new Mouse("瑞士", 10,cat);
            cat.Caught();
            
            Console.ReadLine();

        }
    }
    class Cat
    {
        string name;
        int age;

        public Cat(string name, int age)
        {
            this.name = name;
            this.age = age;
        }
        public void Caught()
        {
            Console.WriteLine(name + "猫来抓老鼠了");
            if (catCome != null)
                catCome();
        }
        public event Action catCome;
    }
    class Mouse
    {
        string name;
        int age;

        public Mouse(string name, int age,Cat cat)
        {
            this.name = name;
            this.age = age;
            cat.catCome += Run;
        }
        public void Run()
        {
            Console.WriteLine(name + "快跑");
        }
    }

事件与委托的区别

事件不能再类的外部调用，可以在外部注册

委托可以在类的外部调用，可以在外部注册

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