public delegate int ceshi(object o1, object o2);

        static void Main(string[] args)

        {

            string[] a = { "abCdeg", "ssxAf" };

            object [] b = { 2, 9, 5, 6 };

            object result=zhenga(a,gets);

            Console.WriteLine(result);

            Console.ReadKey();

        }

        public static int compare(object o1, object o2)

        {

            int num1 = (int)o1;

            int num2 = (int)o2;

            return num1 - num2;

        }

        public static int gets(object o1, object o2)

        {

            string num1 = (string)o1;

            string num2 = (string)o2;

            return num1.Length - num2.Length;

        }

        public static object zheng(object[] name,ceshi aaax)

        {

            object max = name[0];

            for (int i = 0; i < name.Length; i++)

            {

                //max-name[i]<0

                if (aaax(max,name[i])<0)

                {

                    max = name[i];

                }

            }

            return max;

        }

        public static object zhenga(object[] name, ceshi ce)

        {

            object names = name[0];

            for (int i = 0; i < name.Length; i++)

            {

                if (ce(name[i],names)>0)

                {

                    names = name[i];

                }

            }

            return names;

        }