using System;

using System.Collections.Generic;

public class Program

{

    public class Directories

    {

        private List<Item> _items;

​

        public List<Item> Items

        {

            get { return _items; }

            set { _items = value; }

        }

    }

​

    public class Item

    {

        private string _dir;

        private List<string> _files;

​

        public string Dir

        {

            get { return _dir; }

            set { _dir = value; }

        }

​

        public List<string> Files

        {

            get { return _files; }

            set { _files = value; }

        }

​

    }

    public static void Main()

    {

        //Console.WriteLine("Hello World");

    }

}