I am upgrading .xls download in .aspx page to .xlsx download using c# EppPlus. How can I add Alternative row background color like each other row has gray background ?

I am using the below code

```
public void DumpExcel(DataTable tbl)
{
    using (ExcelPackage pck = new ExcelPackage())
    {
        //Create the worksheet
        ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Sheet1");

        ws.Cells["A1"].LoadFromDataTable(tbl, true);

        using (ExcelRange rng = ws.Cells["A1:AA1"])
        {
            rng.Style.Font.Bold = false;
            rng.Style.Fill.PatternType = ExcelFillStyle.Solid; //Set Pattern for the background to Solid
            rng.Style.Fill.BackgroundColor.SetColor(Color.FromArgb(0, 51, 153));  //Set color to dark blue
            rng.Style.Font.Color.SetColor(Color.White);
            rng.Style.Font.Size = 10;
        }

        // Add Word wrap
        for (int i = 1; i <= tbl.Columns.Count; i++)
        {
            ws.Column(i).AutoFit();
            ws.Column(i).Width = 20;
            ws.Column(i).Style.WrapText = true;
            ws.Column(i).Style.VerticalAlignment = ExcelVerticalAlignment.Top;
            ws.Column(i).Style.Font.Size = 9;
        }

        //Write it back to the client
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.AddHeader("content-disposition", "attachment;  filename=UserEntitleDLX.xlsx");
        Response.BinaryWrite(pck.GetAsByteArray());
    }
}

```