文件格式转化 excel->.csv outlook->.csv 能做吗？

Question

Excel.Application oExcel;
Excel.Workbook oBook;Object oMissing= System.Reflection.Missing.Value;
oExcel = new Excel.Application();
oExcel.Visible =false;

oBook = oExcel.Workbooks.Open(excelfile,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing,oMissing, oMissing,oMissing,oMissing);

//Save xls file
oBook.Saved = true;
oExcel.UserControl = false;
oBook.SaveAs(xlsfile,Excel.XlFileFormat.xlCSV,oMissing,oMissing,oMissing,oMissing,Excel.XlSaveAsAccessMode.xlExclusive,oMissing,oMissing, oMissing,oMissing,oMissing);