public ExcelWriter(string firstSheetName) : this() { var sheet = _doc.WorkbookPart.Workbook.Descendants <Sheet>().First(s => s.Name == "Sheet1"); if (sheet != null) { sheet.Name = firstSheetName; } SpreadsheetWriter.RemoveWorksheet(_doc, "Sheet2"); SpreadsheetWriter.RemoveWorksheet(_doc, "Sheet3"); }