public static int Paixu( int shuzu)
        {
            
        for (int a=0;a<shuzu.Length ;a++ )
            {
            int zuida;
            zuida = shuzu[0];
                if (zuida < shuzu[a])
                {
                    zuida = shuzu[a];
                }
            }
        return zuida;
        }
        
        static void Main(string[] args)
        {
            int[] shuzu = new int[5];
            for (int a=0;a<shuzu.Length ;a++ )
            {
                Console.WriteLine("请输入数值");
                shuzu[a] = Convert.ToInt32(Console.ReadLine());
            }
            int _zuida =zuida;
            Console.WriteLine("最大数值为{0}",_zuida);

你想问啥  或者你想实现啥功能

是这个意思吗

 public static int Paixu(int[] shuzu)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace cjt2
{
    class Program
    {
        public static int Paixu(int[] shuzu)
        {
            int zuida=0;

            for (int a = 0; a < shuzu.Length; a++)
            {
               
                if (zuida < shuzu[a])
                {
                    zuida = shuzu[a];
                }
            }
            return zuida;
        }

        static void Main(string[] args)
        {
            int[] shuzu = new int[5];
            shuzu[0] = 9;
            shuzu[1] = 19;
            shuzu[2] = 98;
            shuzu[3] = 29;
            shuzu[4] = 93;
            Console.WriteLine("最大数值为{0}",Paixu(shuzu)); 



        }
    }
}

谢谢   真的 感谢    原来  调用数组是这样写的  谢谢 哈   我看的 视频中没有这个所以问的 谢谢你哈