Datatable with blob fields to CSV

IGRDal dl = SQLDalFactory.GetDal(GrConnector.AccessSQLDal);

             string tempCsvFileSpec = APP_PATH+ @"\dump.csv";

             using (StreamWriter writer = new StreamWriter(tempCsvFileSpec))
             {
                 DBHelper.WriteDataTable(dl.CreateDataTable(), writer, false);
             }
             dbConection.Open();
             var msbl = new MySqlBulkLoader(dbConection);
             msbl.TableName = "tb_templates";
             msbl.FileName = tempCsvFileSpec;
             msbl.FieldTerminator = ",";
             msbl.FieldQuotationCharacter = '"';
             msbl.Load();
             File.Delete(tempCsvFileSpec);



this is the code to make CSV
public static void WriteDataTable(DataTable sourceTable, TextWriter writer, bool includeHeaders)
        {
            if (includeHeaders)
            {
                IEnumerable<string> headerValues = sourceTable.Columns
                    .OfType<datacolumn>()
                    .Select(column => QuoteValue(column.ColumnName));

                writer.WriteLine(String.Join(",", headerValues));
            }

            IEnumerable<string> items = null;

            foreach (DataRow row in sourceTable.Rows)
            {
                items = row.ItemArray.Select(o => QuoteValue(o.ToString()));
                writer.WriteLine(String.Join(",", items));
            }

            writer.Flush();
        }

        private static string QuoteValue(string value)
        {
            return String.Concat("\"",
            value.Replace("\"", "\"\""), "\"");
        }</string></datacolumn></string>