private void ValidationErrorMessage(int index, string textBoxText) { if (_validateService.ValidateByIndex(index, textBoxText)) { if (index == 2) { var date = DateTime.Parse(textBoxText); textBoxText = $"{date.Month}/{date.Day}/{date.Year}"; } orderListView.SelectedItems[0].SubItems[index].Text = textBoxText; orderListView.SelectedItems[0].BackColor = Color.White; } else { MessageBox.Show(_validateService.GetErrorMessageTextByIndex(index)); } }