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.IO;

using System.Data;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO.Compression;

using System.Reflection;

​

using NUnit.Framework; //NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/65936426/serialize-property-does-not-allow-same-values-to-xml

​

// The data model included in the question

​

    public class AProperty

        {

        [XmlAttribute("Name")]

        public string PropertyName { get; set; }

​

        [XmlAttribute]

        public string OldValue { get; set; }

​

        [XmlAttribute]

        public string NewValue { get; set; }

    }

​

// A data model for the remaining XML I generated myself

​

    [XmlRoot(ElementName="Properties")]

    public class Properties {

        [XmlElement(ElementName="AProperty")]

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

    }

​

    [XmlRoot(ElementName="ObjectTypeProperties")]

    public class ObjectTypeProperties {

        [XmlElement(ElementName="ObjectType")]

        public string ObjectType { get; set; }

        [XmlElement(ElementName="ObjectName")]

        public string ObjectName { get; set; }

        [XmlElement(ElementName="ObjectId")]

        public string ObjectId { get; set; }

        [XmlElement(ElementName="Properties")]

        public Properties Properties { get; set; }

    }

​

    [XmlRoot(ElementName="Properties")]

    public class AppEventLogObjectProperties {

        [XmlElement(ElementName="ObjectTypeProperties")]

        public ObjectTypeProperties ObjectTypeProperties { get; set; }

    }

​

    [XmlRoot(ElementName="AppEventLogObject")]

    public class AppEventLogObject {

        [XmlElement(ElementName="ObjectId")]

        public string ObjectId { get; set; }

        [XmlElement(ElementName="Properties")]

        public AppEventLogObjectProperties Properties { get; set; }

        [XmlElement(ElementName="Description")]

        public string Description { get; set; }

    }

​

// A test case I generated myself.

​

    public class TestClass

    {

        public static void Test()

        {

            var log = new AppEventLogObject

            {

                ObjectId = "123",

                Description = "Group",

                Properties = new AppEventLogObjectProperties

                {

                    ObjectTypeProperties = new ObjectTypeProperties

                    {

                        ObjectType = "Agents allowed",

                        ObjectName = "Agents",

                        ObjectId  = "",

                        Properties = new Properties

                        {

                            AProperty = new List<AProperty>

                            {

                                new AProperty { PropertyName = "UserID", NewValue = "123", OldValue = "123" },

                                new AProperty { PropertyName = "Close", NewValue = "No", OldValue = "Yes" },

                            },

                        },

                    },

                },

            };

            var xml = log.GetXml(omitStandardNamespaces: true);

            Console.WriteLine(xml);

            XmlAssert.AreEqual(XElement.Parse(xml), XElement.Parse(GetRequiredXml()));

        }

        static string GetRequiredXml() =>

            @" <AppEventLogObject>

            <ObjectId>123</ObjectId>

        <Properties>

            <ObjectTypeProperties>

                <ObjectType>Agents allowed</ObjectType>

                <ObjectName>Agents</ObjectName>

                <ObjectId />

                <Properties>

                    <AProperty Name=""UserID"" NewValue=""123""  OldValue=""123""/>

                    <AProperty Name=""Close"" OldValue=""Yes"" NewValue=""No"" />

                </Properties>

            </ObjectTypeProperties>

        </Properties>

        <Description>Group</Description>

    </AppEventLogObject>";

    }

​

    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, 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 static class XmlAssert

    {

        // https://weblogs.asp.net/marianor/easy-way-to-compare-two-xmls-for-equality

        // https://stackoverflow.com/questions/7318157/best-way-to-compare-xelement-objects

        // Adapted from the answer https://stackoverflow.com/a/14463137 by https://stackoverflow.com/users/1102100/robjohnson

        public static void AreEqual(

            XElement expected,

            XElement actual)

        {

            Assert.IsTrue(XNode.DeepEquals(Normalize(expected), Normalize(actual)));

        }

​

        private static XElement Normalize(XElement element)

        {

            if (element.HasElements)

            {

                return new XElement(

                    element.Name,

                    element.Attributes()

                           .OrderBy(a => a.Name.ToString()),

                    element.Elements()

                           .OrderBy(a => a.Name.ToString())

                           .Select(e => Normalize(e)));

​

            }

​

            if (element.IsEmpty)

            {

                return new XElement(

                    element.Name,

                    "",

                    element.Attributes()

                           .OrderBy(a => a.Name.ToString()));

            }

​

            return new XElement(element.Name, element.Attributes()

                .OrderBy(a => a.Name.ToString()), element.Value);

        }

    }

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

        public static string GetNetCoreVersion()

        {

            //https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be

            //

            var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;

            var assemblyPath = assembly.CodeBase.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);

            int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");

            if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)

                return assemblyPath[netCoreAppIndex + 1];

            return null;

        }

    }

​