XmlSerializer to NFE

XmlSerializer.cs

public XmlDocument CriarArquivoEnvio()
        {
            var consultaServico = new StatusServicoEnvio("1.00", 2);
            var serializer = new XmlSerializer(typeof (StatusServicoEnvio));
            using (var stream = new StreamWriter(PathEnvio))
            {
                serializer.Serialize(stream, consultaServico);
            }
            var doc = new XmlDocument();
            doc.Load(PathEnvio);
            doc.InnerXml = doc.InnerXml.Replace(@"<?xml version=""1.0"" encoding=""utf-8""?>", "");
            doc.InnerXml =
                doc.InnerXml.Replace(
                    @"xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema""",
                    @"xmlns=""http://www.portalfiscal.inf.br/mdfe""");
            return doc;
        }

        public void CriarArquivoRetorno(string xml)
        {
            var docRetorno = new XmlDocument();
            var xmlTratado = xml.Replace(@" xmlns=""http://www.portalfiscal.inf.br/mdfe""", "");
            docRetorno.LoadXml(@"<retConsStatServMDFe>" + xmlTratado + "</retConsStatServMDFe>");

            var xmlWriter = new XmlTextWriter(PathRetorno, null);
            xmlWriter.Formatting = Formatting.Indented;
            docRetorno.Save(xmlWriter);
            xmlWriter.Close();
        }

        public StatusServicoResposta Deserializar()
        {
            var deserialier = new XmlSerializer(typeof (StatusServicoResposta));
            var reader = new StreamReader(PathRetorno);
            var obj = deserialier.Deserialize(reader);
            var resposta = (StatusServicoResposta) obj;
            reader.Close();
            return resposta;
        }