// 9. Save to file (no Excel installed required) workbook.SaveAs(@"C:\Reports\SalesReport.xlsx", FileFormat.OpenXMLWorkbook);
// 3. Apply formatting to headers (bold, background color) IRange headerRange = worksheet.Cells["A1:D1"]; headerRange.Font.Bold = true; headerRange.Interior.Color = System.Drawing.Color.LightGray; headerRange.Borders.LineStyle = SpreadsheetGear.Advanced.Cells.LineStyle.Continuous; spreadsheetgear example
// 5. Write Excel formulas for total revenue worksheet.Cells["D2"].Formula = "=B2*C2"; worksheet.Cells["D3"].Formula = "=B3*C3"; headerRange.Font.Bold = true