private bool Exists(Dossier directory, string name) { fichier[] list = directory.Getlistfichier(); int i = 0; int stop = list.Length - 1; while (i < stop) { while ((list[i] != null)) { if (list[i].GetNom().Equals(name)) { return(true); } else { i++; } } return(false); } return(false); }