using System;
using System.IO;
using System.Collections.Generic;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //StreamWriter w = new StreamWriter("list.txt", false);
            //Console.SetOut(w);

            string path = @"C:\";

            Stack<DirectoryInfo> stack = new Stack<DirectoryInfo>();
            Console.WriteLine(path);

            var di = new DirectoryInfo(path);
            foreach (var d in di.EnumerateDirectories("*", SearchOption.TopDirectoryOnly))
            {
                stack.Push(d);
            }
            foreach (var f in di.EnumerateFiles("*", SearchOption.TopDirectoryOnly))
            {
                Console.WriteLine(f.FullName);
            }

            while (stack.Count > 0)
            {
                di = stack.Pop();
                Console.WriteLine(di.FullName);

                foreach (var d in di.EnumerateDirectories("*", SearchOption.TopDirectoryOnly))
                {
                    stack.Push(d);
                }
                foreach (var f in di.EnumerateFiles("*", SearchOption.TopDirectoryOnly))
                {
                    Console.WriteLine(f.FullName);
                }
            }

            //w.Flush();
            //w.Close();
            //w.Dispose();

            Console.ReadLine();
        }
    }
}