using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace 委托{    //随机数产生委托类型    delegate int DRandomBuilder(int min,int max);    class CRandomBuilder     {        private Random rnd;        public CRandomBuilder()        {            rnd = new Random();        }        public int GetRandomNumber1(int min, int max)        {            return rnd.Next(min,max+1);        }        public int GetRandomNumber2(int min, int max)        {            Random r = new Random(DateTime.Now.Millisecond);            return r.Next(min,max+1);        }    }    class Program    {        static void Main(string[] args)        {            CRandomBuilder bb = new CRandomBuilder();            DRandomBuilder dr1 = new DRandomBuilder(bb.GetRandomNumber1);            DRandomBuilder dr2 = new DRandomBuilder(bb.GetRandomNumber2);            Console.WriteLine("第一个随机数是{0}",dr1(1,9));            Console.WriteLine("第二个随机数是{0}",dr2.Invoke(100,900));        }    }}