private void Button_Click2(object sender, RoutedEventArgs e) { string w = ""; string s = ""; string t = ""; w = aWord.Text; s = aStatus.SelectedValue.ToString(); t = aTranslation.Text; if (aWord.Text != "" && aStatus.SelectedValue.ToString() != "" && aTranslation.Text != "") { if (word.check(aWord.Text)) { MessageBox.Show("This word already exists !", "Attention", MessageBoxButton.OK, MessageBoxImage.Error); } else { word.writeWords(w, s, t); } aWord.Text = ""; aTranslation.Text = ""; } word.initialize(); SearchWord.ItemsSource = word.word; }