using System;

using System.IO;

using System.Runtime.Serialization;

using System.Text;

using System.Xml;

​

class Program

{

    static void Main(string[] args)

    {

        var serializer = new DataContractXmlSerializer<Model>();

​

        var xml = "<Model><Id>5</Id></Model>";

​

        var model = serializer.Deserialize(xml);

​

        Console.WriteLine($"model.Id = {model.Id}");

​

        var newXml = serializer.Serialize(model);

​

        Console.WriteLine($"newXml = \"{newXml}\"");

    }

}

​

public class DataContractXmlSerializer<T>

{

    private readonly DataContractSerializer _dataContractSerializer;

​

    public DataContractXmlSerializer()

    {

        _ = Attribute.GetCustomAttribute(typeof(T), typeof(DataContractAttribute))

            ?? throw new InvalidOperationException($"Type {typeof(T)} does not contain Attribute of type {typeof(DataContractAttribute)}.");

​

        _dataContractSerializer = new DataContractSerializer(typeof(T));

    }

​

    public T Deserialize(string xml)

    {

        var xmlData = Encoding.UTF8.GetBytes(xml);

        var xmlStream = new MemoryStream(xmlData);

​

        using (XmlDictionaryReader reader = XmlDictionaryReader.CreateTextReader(xmlStream, Encoding.UTF8, new XmlDictionaryReaderQuotas(), null))

        {

            return (T)_dataContractSerializer.ReadObject(reader);

        }

    }

​

    public string Serialize(T obj)

    {

        using (MemoryStream memoryStream = new MemoryStream())

        {

            _dataContractSerializer.WriteObject(memoryStream, obj);

            return Encoding.UTF8.GetString(memoryStream.ToArray());

        }

    }

}

​

[DataContract(Namespace="")]

public class Model

{

    public Model(int id)

    {

        this._id = id;

    }

​

    [DataMember(Name="Id")]

    private int _id;

​

    public int Id { get { return this._id; } }

}