private string Serialize(object source, System.Text.Encoding encoding)
        {

            Type t = source.GetType();
         

            System.Xml.XmlWriterSettings xmlWriterSettings = new System.Xml.XmlWriterSettings();
            xmlWriterSettings.Encoding = encoding;
            xmlWriterSettings.Indent = true;
            xmlWriterSettings.NewLineOnAttributes = true;

            using (MemoryStream memoryStream = new MemoryStream())
            {
                DataContractSerializer serializer = new DataContractSerializer(t);
                using (System.Xml.XmlWriter xWriter = System.Xml.XmlWriter.Create(memoryStream, xmlWriterSettings))
                {
                    serializer.WriteObject(xWriter, source);
                    xWriter.Flush();
                    return encoding.GetString(memoryStream.ToArray());
                }

            }
        }