C#生成随机ArrayList的方法

public static void RandomizeArrayList(ArrayList arrayList, Random random) {
  if(arrayList == null) { return; }
  int count = arrayList.Count;
  for(int i=0;i<count;i++) {
    Object tmp = arrayList[i];
    arrayList.RemoveAt(i);
    arrayList.Insert(random.Next(count), tmp);
  }
}