partial void DeleteAlbum(Album instance);
 partial void UpdateAlbum(Album instance);
 private void detach_Albums(Album entity)
 {
     this.SendPropertyChanging();
     entity.Artist = null;
 }
 partial void InsertAlbum(Album instance);
 private void attach_Albums(Album entity)
 {
     this.SendPropertyChanging();
     entity.Artist = this;
 }