private void deleteFeedback_Click(object sender, RoutedEventArgs e) { if (feedback.Count != 0 && feedbackIdx != -1) { SQLQuery mSQLQuery = new SQLQuery(); int id = feedback.ElementAt(feedbackIdx).Item1.Item1; mSQLQuery.deleteParentFeedback(id); parentNameLabel.Content = ""; feedbackText.Text = ""; feedback.Remove(feedback.ElementAt(feedbackIdx)); feedbackIdx--; } }