private void detach_Ksiazka(Ksiazka entity)
 {
     this.SendPropertyChanging();
     entity.Autor = null;
 }
 private void attach_Ksiazka(Ksiazka entity)
 {
     this.SendPropertyChanging();
     entity.Autor = this;
 }
 partial void UpdateKsiazka(Ksiazka instance);
 partial void DeleteKsiazka(Ksiazka instance);
 partial void InsertKsiazka(Ksiazka instance);