Background color field is not working in 31-03-2009 version

[GoogleCodeExporter]

What steps will reproduce the problem?
1.      Workbook workbook = new Workbook();
        Worksheet worksheet = new Worksheet("First Sheet");
        worksheet.Cells[0, 1] = new Cell("teste");
        worksheet.Cells.ColumnWidth[0, 1] = 3000;
        worksheet.Cells[0, 1].Style = new CellStyle();
        worksheet.Cells[0, 1].Style.BackColor = System.Drawing.Color.Gold;
        workbook.Worksheets.Add(worksheet);
        workbook.Save(file);
2.
3.

What is the expected output? What do you see instead?
I expected to change the cell background color, but it doesn't work.

What version of the product are you using? On what operating system?
ExcelLibrary_20090331.zip. There's another issue that says that in a new 
version (up from 12-02-2009) this issue is solved, I tried in 31-03-2009 
version, but it's not working.

Please provide any additional information below.

Original issue reported on code.google.com by andrefix...@gmail.com on 29 Sep 2009 at 5:07

[GoogleCodeExporter]

I am using the DLL from 4/14/2011 and changing the BackColor of the cell is 
still not being saved to the file.

Original comment by jeffbr...@gmail.com on 1 Jun 2011 at 4:09

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I am using the 30/07/2011 and not being able to do it.

Original comment by ahmed.ar...@gmail.com on 14 Dec 2011 at 1:02

[GoogleCodeExporter]

me too, I use the 30/07/2011 version does not effect

Original comment by nganphun...@gmail.com on 7 Mar 2012 at 8:44