using System;
using System.IO;

public class DirectoryDemo{

  public static void Main(){
    string fileName = "directory.cs";       // The current source file
    FileInfo fi = new FileInfo(fileName);   // This source file

    string thisFile =  fi.FullName,
           thisDir =   Directory.GetParent(thisFile).FullName,
           parentDir = Directory.GetParent(thisDir).FullName;

    Console.WriteLine("This file: {0}", thisFile);
    Console.WriteLine("This Directory: {0}", thisDir);
    Console.WriteLine("Parent directory: {0}", parentDir);

    string[] files = Directory.GetFiles(parentDir);
    string[] dirs =  Directory.GetDirectories(parentDir);

    Console.WriteLine("\nListing directory {0}:", parentDir);
    foreach(string d in dirs)
      Console.WriteLine(d);
    foreach(string f in files)
      Console.WriteLine(f);

  }
}