// For Directory.GetFiles and Directory.GetDirectories
// For File.Exists, Directory.Exists
using System;
using System.IO;
using System.Collections;
 
public class RecursiveFileProcessor
{
    public static void Main(string[] args)
    {
        System.Console.WriteLine("parameter count = {0}", args.Length);
        if (Directory.Exists(args[0]))
            {
                // This path is a directory
                Console.WriteLine("Il y a {0} repertoires dans {1}.", ProcessDirectory(args[0]), args[0]);
            }
            else
            {
                Console.WriteLine("{0} is not a valid directory.",  args[0]);
            }       
    }
 
 
    // Process all directories
    // that are found, and process the files they contain.
    public static int ProcessDirectory(string targetDirectory)
    {
        int resultat = 0;
        // Recurse into subdirectories of this directory.
        string [] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
        foreach(string subdirectory in subdirectoryEntries) // pour chaque sous répertoire
            resultat = resultat + 1 + ProcessDirectory(subdirectory); // on compte le répertoire actuel au quel on ajoute le nombre de sous-dossiers
 
        return resultat;
    }
}