create .csv file to listview subitem

class ListViewToCSV { public static void ListViewToCSV(ListView listView, string filePath, bool includeHidden) { //make header string StringBuilder result = new StringBuilder(); WriteCSVRow(result, listView.Columns.Count, i => includeHidden || listView.Columns[i].Width > 0, i => listView.Columns[i].Text); //export data rows foreach (ListViewItem listItem in listView.Items) WriteCSVRow(result, listView.Columns.Count, i => includeHidden || listView.Columns[i].Width > 0, i => listItem.SubItems[i].Text); File.WriteAllText(filePath, result.ToString()); } private static void WriteCSVRow(StringBuilder result, int itemsCount, Func isColumnNeeded, Func columnValue) {         bool isFirstTime = true; for (int i = 0; i < itemsCount; i++) { if (!isColumnNeeded(i)) continue; if (!isFirstTime)                 result.Append(",");             isFirstTime = false;              result.Append(String.Format("\"{0}\"", columnValue(i))); }         result.AppendLine(); } }