private void bnChangePublishInformation_Click(object sender, EventArgs e) { if (lbTypePublish.Text == "Magazine") { var magazine = new Magazine(Convert.ToInt32(lbCode.Text), Convert.ToInt32(tbRelease.Text), tbNamePublish.Text, tbPublishYear.Text, tbPublishDescription.Text, new List <Book>()); var text = presenter.ChangePublisheInfo(magazine); MessageBox.Show(text); } if (lbTypePublish.Text != "Magazine") { var newspaper = new Newspaper(Convert.ToInt32(lbCode.Text), Convert.ToInt32(tbRelease.Text), tbNamePublish.Text, tbPublishYear.Text, tbPublishDescription.Text, new List <Book>()); var text = presenter.ChangePublisheInfo(newspaper); MessageBox.Show(text); } }