何意数排序

using System;
public class Test
{
 public static void Main()
 {
  //不知道怎么搞的,两个不能同进用,想不明白,可能是前一种方法已经把值给改变了
  int x;
  int temp;
  Console.WriteLine ("你想排几个数的序:");
  x=int.Parse (Console.ReadLine ());
  int[] array_previous=new int [x];
  for(int i=0;i<array_previous.Length;i++)
  {
   Console.WriteLine ("请输入第{0}个数:",i+1);
   array_previous[i]=int.Parse (Console.ReadLine ());
  }
  for(int index=1;index<array_previous.Length;index++)
  {
   
   if(array_previous[index-1]<array_previous[index])
   {
    temp=array_previous[index-1];
    array_previous[index-1]=array_previous[index];
    array_previous[index]=temp;
   }
  }
  Console.WriteLine ("正序排列为:");
  foreach(int pin in array_previous)
  {
   Console.Write (pin+"\t");
  }
  Console.WriteLine ();
     for(int index=1;index<array_previous.Length;index++)
  {
   if(array_previous[index-1]>array_previous[index])
   {
    temp=array_previous[index-1];
    array_previous[index-1]=array_previous[index];
    array_previous[index]=temp;
   }
  }
  Console.WriteLine ("反序排列为:");
  foreach(int pin in array_previous)
  {
   Console.Write (pin+"\t");
  }
  Console.WriteLine ();
 }
}