c# 求数组的最大值

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _08求数组的最大值
{
    public delegate int DelCompare(object o1, object o2);
    class Program
    {
        static void Main(string[] args)
        {
            object[] nums = { 1, 2, 3, 4, 5, 6, 7 };
            object[] names = { "张三", "李FatSoFat shit", "王五" };

            object[] pers = { new Person() { Name = "张三", Age = 19 }, new Person() { Name = "李四", Age = 20 }, new Person() { Name = "王五", Age = 22 } };

            //object:任意传任意类型
            //object[]:只能object类型的数组
            //object max = GetMax(nums, C1);
            //object max = GetMax(names, C2);
            //object max = GetMax(pers, C3);
            //Console.WriteLine(((Person)max).Age);
            //Console.WriteLine(((Person)max).Name);
            //Console.ReadKey();

            object max = GetMax(names, (o1, o2) => { return ((string)o1).Length - ((string)o2).Length; });
            Console.WriteLine(max);

            object max2 = GetMax(pers, (o1, o2) => { return ((Person)o1).Age - ((Person)o2).Age; });
            Console.WriteLine(((Person)max2).Name);
            Console.WriteLine(((Person)max2).Age);
            Console.ReadKey();

        }

        static object GetMax(object[] nums, DelCompare del)//外面传进来一个比较的方式
        {
            object max = nums[0];
            for (int i = 0; i < nums.Length; i++)
            {
                //委托 ： max-nums[i]
                if (del(max, nums[i]) < 0)//比较的方式 if(nums[i]>max)
                {
                    max = nums[i];
                }
            }
            return max;
        }


        //static int C1(object o1, object o2)
        //{
        //    int n1 = (int)o1;
        //    int n2 = (int)o2;
        //    return n1 - n2;
        //}

        //static int C2(object o1, object o2)
        //{
        //    string s1 = (string)o1;
        //    string s2 = (string)o2;
        //    return s1.Length - s2.Length;
        //}
        //static int C3(object o1, object o2)
        //{
        //    Person p1 = (Person)o1;
        //    Person p2 = (Person)o2;
        //    return p1.Age - p2.Age;
        //}

        #region MyRegion
        //static object GetMax(object[] names)
        //{
        //    object max = names[0];
        //    for (int i = 0; i < names.Length; i++)
        //    {
        //        if (names[i].Length > max.Length)
        //        {
        //            max = names[i];
        //        }
        //    }
        //    return max;
        //}
        //static object GetMax(object[] pers)
        //{
        //    object pMax = pers[0];
        //    for (int i = 0; i < pers.Length; i++)
        //    {
        //        if (pers[i].Age > pMax.Age)
        //        {
        //            pMax = pers[i];
        //        }
        //    }
        //    return pMax;
        //} 
        #endregion

    }


    class Person
    {
        public int Age { get; set; }
        public string Name { get; set; }
    }
}