class Program
{
    static void Main()
    {
        // Create a new empty workbook in a new workbook set.
        SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
        // Set Sheet1!A1 to "Hello World!".
        workbook.Worksheets["Sheet1"].Cells["A1"].Value = "Hello World!";
        // Save to C:\MyData.xls as Excel file.
        workbook.SaveAs(@"C:\MyData.xls", SpreadsheetGear.FileFormat.Excel8);
        // Open C:\MyData.xls.
        workbook = SpreadsheetGear.Factory.GetWorkbook(@"C:\MyData.xls");
        // Output Sheet1!A1.
        System.Console.WriteLine(workbook.Worksheets["Sheet1"].Cells["A1"].Value.ToString());
    }
}