Converting RSS feed into DataTable

Hi i am reading the RSS feed and creating an XML using the DataTable. This is my code

  try
            {
                DataTable tbl = new DataTable();
                tbl.Columns.Add("id");
                tbl.Columns.Add("product_name");
                tbl.Columns.Add("description");

                //Extra Nodes
                tbl.Columns.Add("brand");
                tbl.Columns.Add("condition");
                tbl.Columns.Add("product_type");

                        XmlDocument doc = new XmlDocument();
                        XmlDocument xmlDoc = new XmlDocument();
                        xmlDoc.Load(s);
                        XmlNodeList itemNodes = xmlDoc.SelectNodes("//rss/channel/item");
                        foreach (XmlNode itemNode in itemNodes)
                        {
                            DataRow row = tbl.NewRow();
                            XmlNode idNode = itemNode.SelectSingleNode("id");
                            XmlNode product_nameNode = itemNode.SelectSingleNode("product_name");
                            XmlNode descriptionNode = itemNode.SelectSingleNode("description");

                            //extra nodes
                            XmlNode brandNode = itemNode.SelectSingleNode("brand");
                            XmlNode conditionNode = itemNode.SelectSingleNode("condition");
                            XmlNode product_typeNode = itemNode.SelectSingleNode("product_type");



                            if (idNode != null && product_nameNode != null && descriptionNode != null && linkNode != null && image_linkNode != null && priceNode != null && availabilityNode != null)
                            {
                                row[0] = idNode.InnerText;
                                row[1] = product_nameNode.InnerText;
                                row[2] = descriptionNode.InnerText;
                                row[3] = linkNode.InnerText;

                                //extra nodes
                                if (brandNode == null)
                                    row[4] = "";
                                else
                                    row[4] = brandNode.InnerText;

                                if (conditionNode==null)
                                    row[5] = "";
                                else
                                    row[5] = conditionNode.InnerText;

                                if (product_typeNode==null)
                                    row[6] = "";
                                else
                                    row[6] = product_typeNode.InnerText;

                                                          }
                            tbl.Rows.Add(row);
                            // tbl.Rows.Add(row);
                        }

                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.Read();

            }

This is working fine without any issue but i want to make my code more efficient. Is this the good way to read the Rss and add into the datatable ?