static void Main(string[] args) { IWorkbook wb = new XSSFWorkbook(); wb.CreateSheet("new sheet"); wb.CreateSheet("second sheet"); wb.CreateSheet("third sheet"); wb.SetSheetOrder("second sheet", 0); wb.SetSheetOrder("new sheet", 1); wb.SetSheetOrder("third sheet", 2); FileStream sw = File.Create("../../data/Reordered.xls"); wb.Write(sw); sw.Close(); }