Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

if (xlApp == null)
{
MessageBox.Show(„Excel is not properly installed!!”);
return;
}

Excel.Workbook xlWorkBook;
Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;

xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

xlWorkSheet.Cells[1, 1] = „ID”;
xlWorkSheet.Cells[1, 2] = „Name”;
xlWorkSheet.Cells[2, 1] = „1”;
xlWorkSheet.Cells[2, 2] = „One”;
xlWorkSheet.Cells[3, 1] = „2”;
xlWorkSheet.Cells[3, 2] = „Two”;

xlWorkBook.SaveAs(„d:\\csharp-Excel.xls”, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();

Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);