委托事例（只适用于初学者）

class Program
    {
        static void Main(string[] args)
        {
            GreetPeoPle("jimmy", ChineseGreeting);
        }

        public delegate void GreetingDelegate(string name);

        private static void GreetPeoPle(string name,GreetingDelegate greetingDelegate)
        {
            greetingDelegate(name);
        }

        private static void EnglishGreeting(string name)
        {
            Console.WriteLine("Morning,"+name);
            Console.ReadLine();
        }

        private static void ChineseGreeting(string name)
        {
            Console.WriteLine("早上好，" + name);
            Console.ReadLine();
        }
    }