int[] a = new int[10];
            int i;
            label1.Text = "排序前的10个数字的顺序:\n";
            Random rand = new Random();
            for(i=0;i<a.Length;i++)
            {
                a[i] = rand.Next(0,10);
                label1.Text = label1.Text+a[i].ToString() + ",";
            }
            label2.Text="排序后的10个数字顺序\n";
            for(i=a.Length-1;i<=0;i--)
            {
                label2.Text = label2.Text+a[i].ToString() + ",";
            }

原来是这样，谢谢啊。