private void readButton_Click(object sender, EventArgs e) { try { string itemID = readOneTextBox.Text; int id = Convert.ToInt32(itemID); Item newItem = new Item(id); SofwareItem newSoft = new SofwareItem(id); HardwareItem newhard = new HardwareItem(id); Computer newComp = new Computer(id); Monitor newmon = new Monitor(id); ItemsDatabase db = new ItemsDatabase(); MessageBox.Show(db.readItem(id) + " " + db.readHardware(id) + " " + db.readSoftware(id) + " " + db.readComp(id) + " " + db.readMon(id)); } catch { MessageBox.Show("Try again"); } }