private void detach_movie_casts(movie_cast entity)
 {
     this.SendPropertyChanging();
     entity.movie = null;
 }
 private void attach_movie_casts(movie_cast entity)
 {
     this.SendPropertyChanging();
     entity.movie = this;
 }
 partial void Updatemovie_cast(movie_cast instance);
 partial void Deletemovie_cast(movie_cast instance);
 partial void Insertmovie_cast(movie_cast instance);