老师帮忙 解题 如何方法中引用数组

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);