private void detach_BorrowedBooks(BorrowedBooks entity)
 {
     this.SendPropertyChanging();
     entity.Books = null;
 }
 private void attach_BorrowedBooks(BorrowedBooks entity)
 {
     this.SendPropertyChanging();
     entity.Books = this;
 }
 partial void UpdateBorrowedBooks(BorrowedBooks instance);
 partial void DeleteBorrowedBooks(BorrowedBooks instance);
 partial void InsertBorrowedBooks(BorrowedBooks instance);