Simply, XML Custom Serialization.

XmlCustomSerializer

    public interface IXmlCustomSerializer
    {
        string Serialize<T>(T input);
        T Deserialize<T>(string input);
    }

    public class XmlCustomSerializer : IXmlCustomSerializer
    {
        private XmlSerializer _serializer;

        public string Serialize<T>(T input)
        {
            _serializer = new XmlSerializer(typeof(T));

            var ns = new XmlSerializerNamespaces();
            ns.Add("", "");

            using (var stream = new MemoryStream())
            {
                var settings = new XmlWriterSettings { Indent = true, Encoding = new UTF8Encoding() };
                using (var xmlWriter = XmlWriter.Create(stream, settings))
                {
                    _serializer.Serialize(xmlWriter, input, ns);
                    var buffer = new byte[stream.Length];
                    stream.Seek(0, SeekOrigin.Begin);
                    stream.Read(buffer, 0, buffer.Length);
                    return Encoding.UTF8.GetString(buffer);
                }
            }
        }

        public T Deserialize<T>(string input)
        {
            _serializer = new XmlSerializer(typeof(T));

            using (var memoryStream = new MemoryStream())
            {
                byte[] buffer = Encoding.UTF8.GetBytes(input);
                memoryStream.Write(buffer, 0, buffer.Length);
                memoryStream.Seek(0, SeekOrigin.Begin);
                return (T)_serializer.Deserialize(memoryStream);
            }
        }
    }