如何以相反的顺序迭代.Net IList集合？

class Program
{
    static void Main(string[] args)
    {
        IList<int> list = new List<int> { 1, 2, 3, 4, 5, 6 };
        ReverseOrderList(list);
        foreach (int item in list)
        {
            Console.WriteLine(item);
        }
    }

    static void ReverseOrderList(IList<int> list)
    {
        int cnt = list.Count;
        int i = 0;
        int j = cnt - 1;
        while (i < j)
        {
            Console.WriteLine(list[i]);
            int temp = list[i];
            list[i] = list[j];
            list[j] = temp;
            i++;
            j--;
        }
    }
}