private void detach_Favorites(Favorite entity)
 {
     this.SendPropertyChanging();
     entity.Playlist = null;
 }
 partial void DeleteFavorite(Favorite instance);
 partial void InsertFavorite(Favorite instance);
 partial void UpdateFavorite(Favorite instance);
 private void attach_Favorites(Favorite entity)
 {
     this.SendPropertyChanging();
     entity.User = this;
 }