public static void SalvarResumoLivroEmXml(TOResumoLivro ObjResumo, string CaminhoASalvar)
        {
            string xml = SerializeToXml <TOResumoLivro>(ObjResumo);

            byte[] criptografado = HelperCriptografia.Criptografar(xml);

            File.WriteAllBytes(CaminhoASalvar, criptografado);
        }
        private static void SalvarXmlCriptografado(XmlDocument XmlDocument, string PathASalvar)
        {
            using (var stringWriter = new StringWriter())
                using (var xmlTextWriter = XmlWriter.Create(stringWriter))
                {
                    XmlDocument.WriteTo(xmlTextWriter);
                    xmlTextWriter.Flush();
                    string xmlString = stringWriter.GetStringBuilder().ToString();

                    File.WriteAllBytes(PathASalvar, HelperCriptografia.Criptografar(xmlString));
                }
        }