using System;

using System.Collections.Generic;

using System.Text;

using System.Linq;

using System.Xml.Serialization;

using System.Xml;

using System.Xml.Linq;

using System.Xml.Schema;

using System.IO;

using System.Data;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO.Compression;

​

// https://stackoverflow.com/questions/50047542/xmlserializer-aborts-reading-after-reader-read?noredirect=1#comment87133934_50047542

​

    public abstract class StreamingXmlSerializableBase : IXmlSerializable

    {

        // Populate the object with the XmlReader returned by ReadSubtree

        protected abstract void Populate(XmlReader reader);

        public XmlSchema GetSchema() => null;

​

        public void ReadXml(XmlReader reader)

        {

            reader.MoveToContent();

            // Consume all child nodes of the current element using ReadSubtree()

            using (var subReader = reader.ReadSubtree())

            {

                subReader.MoveToContent();

                Populate(subReader);

            }

            reader.Read(); // Consume the end element itself.

        }   

​

        public abstract void WriteXml(XmlWriter writer);

    }

    public abstract class XmlSerializableBase : IXmlSerializable

    {

        // Populate the object with an XElement loaded from the XmlReader for the current node

        protected abstract void Populate(XElement element);

        public XmlSchema GetSchema() => null;

​

        public void ReadXml(XmlReader reader)

        {

            reader.MoveToContent();

            var element = (XElement)XNode.ReadFrom(reader);

            Populate(element);

        }   

        public abstract void WriteXml(XmlWriter writer);

    }

​

    public class SerializableClass : XmlSerializableBase

    {

        public string Title { get; set; } = "Test title";

        public string Description { get; set; } = "Super description";

        public int Number { get; set; } = (int)(DateTime.Now.Ticks % 99);

        protected override void Populate(XElement element)

        {

            this.Title = (string)element.Element(nameof(this.Title));

            this.Description = (string)element.Element(nameof(this.Description));

            // Leave Number unchanged if not present in the XML

            this.Number = (int?)element.Element(nameof(this.Number)) ?? this.Number;  

        }

        public override void WriteXml(XmlWriter writer)

        {

            writer.WriteStartElement(nameof(this.Title));

            writer.WriteString(this.Title);

            writer.WriteEndElement();

​

            writer.WriteStartElement(nameof(this.Description));

            writer.WriteString(this.Description);

            writer.WriteEndElement();

​

            writer.WriteStartElement(nameof(this.Number));

            // Do not use ToString() as it is locale-dependent.  

            // Instead use XmlConvert.ToString(), or just writer.WriteValue

            writer.WriteValue(this.Number);

            writer.WriteEndElement();

​

        }

    }

​

    public class MainModel

    {

        public int Count { get => ChildItems.Count; }

        public List<Child> ChildItems { get; set; } = new List<Child>();

​

        public MainModel(bool createDemoContent) : this()

        {

            if (createDemoContent)

            {

                ChildItems.Add(new Child() { Id = 0, Nickname = DateTime.Now.ToLongDateString() });

                System.Threading.Thread.Sleep(1);

                ChildItems.Add(new Child() { Id = 1, Nickname = DateTime.Now.AddHours(-99).ToLongDateString() });

                System.Threading.Thread.Sleep(1);

                ChildItems.Add(new Child() { Id = 2, Nickname = DateTime.Now.AddDays(-99).ToLongDateString() });

            }

        }

​

        public MainModel()

        {

        }

    }

​

    public class Child

    {

        public int Id { get; set; }

        public string Nickname { get; set; }

        public SerializableClass SerializableClass { get; set; } = new SerializableClass();

    }

​

    public class SubChildren

    {

        public string Title { get; set; }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            var xml = GetXml();

            Test(XElement.Parse(xml).ToString(SaveOptions.None));

            Test(XElement.Parse(xml).ToString(SaveOptions.DisableFormatting));

        }

        static void Test(string xml)

        {

            var mainModel = xml.LoadFromXml<MainModel>();

            var xml2 = mainModel.GetXml();

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

            Console.WriteLine(xml);

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

            Console.WriteLine(xml2);

            Assert.IsTrue(XNode.DeepEquals(XElement.Parse(xml), XElement.Parse(xml2)));

        }

        static string GetXml()

        {

            var xml = @"<?xml version=""1.0"" encoding=""utf-8""?>

<MainModel  xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"">

  <ChildItems>

    <Child>

      <Id>0</Id>

      <Nickname>Freitag, 27. April 2018</Nickname>

      <SerializableClass>

        <Title>Test title 1</Title>

        <Description>Super description 1</Description>

        <Number>53</Number>

      </SerializableClass>

    </Child>

    <Child>

      <Id>1</Id>

      <Nickname>Montag, 23. April 2018</Nickname>

      <SerializableClass>

        <Title>Test title 2</Title>

        <Description>Super description 2</Description>

        <Number>79</Number>

      </SerializableClass>

    </Child>

    <Child>

      <Id>2</Id>

      <Nickname>Donnerstag, 18. Januar 2018</Nickname>

      <SerializableClass>

        <Title>Test title 3</Title>

        <Description>Super description 3</Description>

        <Number>9</Number>

      </SerializableClass>

    </Child>

  </ChildItems>

</MainModel>";

            return xml;

        }

    }

​

    public static class XmlSerializationHelper

    {

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

        {

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

            using (var reader = new StringReader(xmlString))

            {

                return (T)serial.Deserialize(reader);

            }

        }

​

        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();

            }

        }

    }

    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 class Program

    {

        public static void Main()

        {

            Console.WriteLine("Roslyn 2.0 Compiler; Environment version: " + Environment.Version);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Uncaught exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​