(期中考)產生亂數

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        int[] arry = new int[9];
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
        }
        private void button5_Click(object sender, EventArgs e)
        {
            int temp;
            int rdno;
            arry[0] = 0;
            arry[1] = 1;
            arry[2] = 2;
            arry[3] = 3;
            arry[4] = 4;
            arry[5] = 5;
            arry[6] = 6;
            arry[7] = 7;
            arry[8] = 8;

            Random rd = new Random();
            button5.Text = Convert.ToString(rd.Next(0, 9));
            rdno = rd.Next(0, 9);
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 1];
            arry[arry.Length - 1] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 2];
            arry[arry.Length - 2] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 3];
            arry[arry.Length - 3] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 4];
            arry[arry.Length - 4] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 5];
            arry[arry.Length - 5] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 6];
            arry[arry.Length - 6] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 7];
            arry[arry.Length - 7] = temp;
            rdno = rd.Next(0, 9);
            button5.Text = Convert.ToString(rd.Next(0, 9));
            temp = arry[rdno];
            arry[rdno] = arry[arry.Length - 8];
            arry[arry.Length - 8] = temp;
            //output
            button5.Text = Convert.ToString(rd.Next(0, 9));
            button1.Text = Convert.ToString(arry[0]);
            button2.Text = Convert.ToString(arry[1]);
            button3.Text = Convert.ToString(arry[2]);
            button4.Text = Convert.ToString(arry[3]);
            button6.Text = Convert.ToString(arry[4]);
            button7.Text = Convert.ToString(arry[5]);
            button8.Text = Convert.ToString(arry[6]);
            button9.Text = Convert.ToString(arry[7]);
            button10.Text = Convert.ToString(arry[8]);
        }
    }
}