I want to convert data table to epplus Excel sheet, I am getting data from via angularjs that data I want to receive and convert to Excel format

Question

public byte[] GetLeaveReportExcel(List<dynamic> details)
{
        try
        {
            var json = JsonConvert.SerializeObject(details);
            DataTable dataTable = (DataTable)JsonConvert.DeserializeObject(json, (typeof(DataTable)));
            // DataTable dt = StringHelper.ClassToDataTable(details);

            //List<string> excelData = new List<string>();
            //byte[] bin = File.ReadAllBytes("C:\\Leave Report.xlsx");
            //byte[] bin = File.ReadAllBytes(Server.MapPath("Templates\TaskReport.xlsx "));

            //DataTable dataTable = new DataTable();

            using (MemoryStream stream = new MemoryStream())
            using (ExcelPackage excelPackage = new ExcelPackage(stream))
            {
                //ExcelCellBase table = new ExcelCellBase (dataTable.Columns.Count);

                foreach (ExcelWorksheet (dataTable.Columns.Count) in excelPackage.Workbook.Worksheets)
                {
                    //loop all rows
                    for (int i = 0; i < dataTable.Rows.Count; i++)
                    {
                        //loop all columns in a row
                        for (int j = 0; j < dataTable.Columns.Count; j++)
                        {
                            //add the cell data to the List
                            if (dataTable.Columns.Count.Cells[i, j].Value != null)
                            {
                                details.Add(dataTable.Columns.Count.Cells[i, j].Value.ToString());
                            }
                        }
                    }
                }

                byte[] content = stream.ToArray();

                return content;
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            if (session != null)
            {
                session.Close();
            }
        }
}