public folder get_folder(long folder_id) { folder res = this.folders.FirstOrDefault(f => f.folder_id == folder_id); if (res != null) { return(res); } foreach (folder f in folders) { res = f.get_folder(folder_id); if (res != null) { return(res); } } return(null); }
public folder add_folder(folder f) { this.folders.Add(f); return(f); }