private void bnChangeArticleInformation_Click(object sender, EventArgs e) { Book newBook = new Book(tbNameBook.Text, tbAuthor.Text, " ", tbPublishYear.Text, tbDescription.Text, 0); var returnText = presenter.ChangeArticleInfo(Convert.ToInt32(lbCode.Text), newBook, lbTypePublish.Text); MessageBox.Show(returnText); }