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.Net;

using System.Xml.XPath;

using System.Globalization;

using System.Collections;

​

namespace Question42490161

{

​

    // https://stackoverflow.com/questions/42490161/how-to-serialize-listlistobject

​

    [XmlRoot(ElementName="_Example")]

    public class _Example {

        [XmlElement(ElementName="_SenseNot")]

        public string _SenseNot { get; set; }

        [XmlElement(ElementName="_GrammaticNot")]

        public string _GrammaticNot { get; set; }

        [XmlElement(ElementName="_Desc")]

        public string _Desc { get; set; }

    }

​

    [XmlRoot(ElementName="_perSubExample")]

    public class _perSubExample {

        [XmlElement(ElementName="_UpperTitle")]

        public string _UpperTitle { get; set; }

        [XmlElement(ElementName="_FormGroup")]

        public string _FormGroup { get; set; }

        [XmlElement(ElementName="_SenseNot")]

        public string _SenseNot { get; set; }

        [XmlElement(ElementName="_GrammaticNot")]

        public string _GrammaticNot { get; set; }

        [XmlElement(ElementName="_Desc")]

        public string _Desc { get; set; }

        [XmlElement(ElementName="_Example")]

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

        [XmlElement(ElementName="_Synonyms")]

        public string _Synonyms { get; set; }

    }

​

    [XmlRoot(ElementName="_perMainExample")]

    public class _perMainExample {

        [XmlElement(ElementName="_perSubExample")]

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

    }

​

    [XmlRoot(ElementName="_perGroup")]

    public class _perGroup {

        [XmlElement(ElementName="_GroupDesc")]

        public string _GroupDesc { get; set; }

        [XmlElement(ElementName="_GroupSense")]

        public string _GroupSense { get; set; }

        [XmlElement(ElementName="_GroupGrammer")]

        public string _GroupGrammer { get; set; }

        [XmlElement(ElementName="_perMainExample")]

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

    }

​

    [XmlRoot(ElementName="OxFordDefinition")]

    public class OxFordDefinition {

        [XmlElement(ElementName="sourceURL")]

        public string SourceURL { get; set; }

        [XmlElement(ElementName="originDesc")]

        public string OriginDesc { get; set; }

        [XmlElement(ElementName="_perGroup")]

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

    }

​

    class TestClass

    {

        internal static void Test()

        {

            string xml;

            using (var client = new WebClient())

            {

                xml = client.DownloadString("http://pastebin.com/raw/BJhRfFNf");

            }

            var root = xml.LoadFromXml<OxFordDefinition>();

            var xml2 = root.GetXml(null, true);

            var ok = XNode.DeepEquals(XElement.Parse(xml), XElement.Parse(xml2));

            Console.WriteLine(ok ? "Original and re-serialized XML are equivalent." : "Original and re-serialized XML are NOT equivalent!");

            Console.WriteLine("Deserialized and re-serialized XML: ");

            Console.WriteLine(xml2);

        }

    }

    public class Program

    {

        public static void Main()

        {

            TestClass.Test();

        }

    }

​

    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, 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();

            }

        }

    }

}

​