mit csinál?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
  class Program
  {
    static int count;
    static void Megjelenit(int[] X, int n)
    {
      Console.Write("{0, 3} -> ", count);
      for (int i = 0; i < n; i++)
      {
        Console.Write(X[i]);
      }
      Console.WriteLine();
    }
    static void Nos(int[] X, int m, int n, int k)
    {
      if (k > 0)
      {
        for (int i = 0; i < m; i++)
        {
          X[n - k] = i;
          Nos(X, m, n, k - 1);
        }
      }
      else
      {
        count++;
        Megjelenit(X, n);
      }
    }
    static void Main(string[] args)
    {
      int n = 2, k = 3;
      int[] A = new int[k];
      Nos(A, n, k, k);
      Console.ReadKey();
    }
  }
}