Is there away to save data to csv file instead of excel. I am using a FileHelperEngine which is responsible for a comma delimited file. At the moment I am exporting to csv from the file dialog, but the filehelperengine does not recognized the file as csv until I resave to CSV from excel. i am currently doing this below

SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.InitialDirectory = @"C:\";
saveFileDialog1.Title = "Save EasyTimesheet CSV";
saveFileDialog1.DefaultExt = "csv";
saveFileDialog1.Filter = "CSV files (*.csv)|*.csv|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.FileName = filenameFormat;

saveFileDialog1.RestoreDirectory = true;

if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
return saveFileDialog1.FileName;
}
else
return filename;
}

--------------------

this.dgTimeSheets.DataSource = _DataViewCSVImport;

FileInfo fileInfo = new FileInfo(filename);

Workbook workbook = new Workbook(WorkbookFormat.Excel2007);
Worksheet ws1 = workbook.Worksheets.Add(fileInfo.Name);

DataPresenterExcelExporter exporter = new DataPresenterExcelExporter();

exporter.Export(this.dgTimeSheets, workbook);
workbook.Save(filename);