private static void Permutation(List<int> v, int m, int n)
        {
            int i;
            if (m < n - 1)
            {
                Permutation(v, m + 1, n);
                for (i = m + 1; i < n; i++)
                {
                    Swap(v, m, i);
                    Permutation(v, m + 1, n);
                    Swap(v, m, i);
                }
            } 
            else
            {
                foreach (int vs in v)
                {
                    Console.Write(vs);
                }
                Console.Write("\r\n");
            }
        }

        private static void Swap(List<int> v, int m, int i)
        {
            int t;
            t = v[m]; v[m] = v[i]; v[i] = t;
        }

调用方法：

List<int> v = new List<int> { 1, 2, 3};
Permutation(v, 0, 3);