using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml.Serialization;

using System.Xml;

using System.IO;

using System.Diagnostics;

using System.Collections.ObjectModel;

using System.Threading;

using System.ComponentModel;

using System.Xml.Linq;

using System.Reflection;

using System.Data;

using System.Xml.Schema;

using System.Text.RegularExpressions;

using System.Net;

using System.Xml.XPath;

using System.Globalization;

using System.ComponentModel.DataAnnotations;

using System.Collections;

using System.Runtime.InteropServices;

using System.Runtime.Serialization;

​

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

​

    public static class JsonExtensions

    {

        const string JsonNamespace = @"http://james.newtonking.com/projects/json";

        const string ArrayAttributeName = @"Array";

​

        public static JToken ToJToken(this XElement xElement, bool omitRootObject, string deserializeRootElementName)

        {

            return xElement.ToJToken(omitRootObject, deserializeRootElementName, Enumerable.Empty<Func<XElement, IEnumerable<XElement>>>());

        }

​

        public static JToken ToJToken(this XElement xElement, bool omitRootObject, string deserializeRootElementName, IEnumerable<Func<XElement, IEnumerable<XElement>>> arrayQueries)

        {

            foreach (var query in arrayQueries)

            {

                var name = XName.Get(ArrayAttributeName, JsonNamespace);

                foreach (var element in query(xElement))

                {

                    element.SetAttributeValue(name, true);

                }

            }

​

            // Convert to Linq to XML JObject

            var settings = new JsonSerializerSettings { Converters = { new XmlNodeConverter { OmitRootObject = omitRootObject, DeserializeRootElementName = deserializeRootElementName } } };

            var root = JToken.FromObject(xElement, JsonSerializer.CreateDefault(settings));

            return root;

        }

    }

​

    public class Person

    {

        public string Name { get; set; }

        public string URL { get; set; }

        [XmlAttribute(AttributeName = "id")]

        [JsonProperty("@id")]

        public string Id { get; set; }

    }

​

    public class Root

    {

        [XmlElement]

        public List<Person> Person { get; set; }

    }

​

    // https://stackoverflow.com/questions/40978662/circular-reference-exception-when-serializing-an-object-containing-a-jtoken-to-x

    class TestClass

    {

        public static void Test()

        {

string xml = @"<?xml version='1.0' standalone='no'?>

<root>

  <perSon ID='1'>

    <name>Alan</name>

    <url>http://www.google.com</url>

  </perSon>

</root>";

​

            var xElement = XElement.Parse(xml);

            var jToken = xElement.ToJToken(true, "", 

                new Func<XElement, IEnumerable<XElement>> [] { e => e.Elements().Where(i => string.Equals(i.Name.LocalName, "Person", StringComparison.OrdinalIgnoreCase)) });

​

            var root = jToken.ToObject<Root>();

​

            Console.WriteLine("\nInput XML: ");

            Console.WriteLine(xml);

​

            Console.WriteLine("\nIntermediate JSON: ");

            Console.WriteLine(jToken);

​

            Console.WriteLine(string.Format("\nDeserialized {0} re-serialized to XML: ", root));

            Console.WriteLine(root.GetXml());

            Assert.IsTrue(root.Person.Count == 1);

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​

    public static class XmlSerializationHelper

    {

        public static T LoadFromXml<T>(this string xmlString, XmlSerializer serial = null)

        {

            serial = serial ?? new XmlSerializer(typeof(T));

            T returnValue = default(T);

            using (StringReader reader = new StringReader(xmlString))

            {

                object result = serial.Deserialize(reader);

                if (result is T)

                {

                    returnValue = (T)result;

                }

            }

            return returnValue;

        }

​

        public static string GetXml<T>(this T obj, bool omitStandardNamespaces)

        {

            return obj.GetXml(null, omitStandardNamespaces);

        }

        public static string GetXml<T>(this T obj, XmlSerializer serializer = null, bool omitStandardNamespaces = false)

        {

            XmlSerializerNamespaces ns = null;

            if (omitStandardNamespaces)

            {

                ns = new XmlSerializerNamespaces();

                ns.Add("", ""); // Disable the xmlns:xsi and xmlns:xsd lines.

            }           

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings() { Indent = true }; // For cosmetic purposes.

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                    (serializer ?? new XmlSerializer(obj.GetType())).Serialize(xmlWriter, obj, ns);

                return textWriter.ToString();

            }

        }

    }

​