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/58847558/c-is-there-a-way-to-determine-if-we-are-currently-in-deserialization-mode-from#58847558

​

    [DataContract]

    class Foo

    {

        [DataMember(Name = "X")]

        double _x;

        [DataMember(Name = "Y")]

        double _y;

​

        double _lastGoodX, _lastGoodY;

        public double X

        {

            get { return _x; }

            set

            {

                CheckCalculateNewPositions(value, _y);

                _x = value;

                _lastGoodX = value;

            }

        }

​

        public double Y

        {

            get { return _y; }

            set

            {

                CheckCalculateNewPositions(_x, value);

                _y = value;

                _lastGoodY = value;

            }

        }

​

        [OnDeserialized]

        public void OnDeserialized(StreamingContext context)

        {

            CheckCalculateNewPositions(_x, _y);

        }

​

        static void CheckCalculateNewPositions(double x, double y)

        {

            if (!CalcNewPositions(x, y))

            {

                throw new ArgumentOutOfRangeException(string.Format("Values are out of bounds: ({0}, {1})", x, y));

            }

        }

        public Foo(double x, double y)

        {

            this._x = x;

            this._y = y;

            CheckCalculateNewPositions(x, y);

        }       

        static bool CalcNewPositions(double x, double y)

        {

            return x > 0 && y > 0;

        }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            var foo = new Foo(1, 1);

            var xml = DataContractSerializerHelper.ToContractXml(foo, settings: new XmlWriterSettings { Indent = true });

            var foo2 = DataContractSerializerHelper.FromContractXml<Foo>(xml);

            var xml2 = DataContractSerializerHelper.ToContractXml(foo, settings: new XmlWriterSettings { Indent = true });

            Console.WriteLine(xml2);

            Assert.That(() => DataContractSerializerHelper.FromContractXml<Foo>(GetBadXml()), Throws.Exception);

        }

        static string GetBadXml()

        {

            return @"<?xml version=""1.0"" encoding=""utf-16""?>

<Foo xmlns:i=""http://www.w3.org/2001/XMLSchema-instance"" xmlns=""http://schemas.datacontract.org/2004/07/"">

  <X>1</X>

  <Y>0</Y>

</Foo>";

        }       

    }

​

    public static partial class DataContractSerializerHelper

    {

        public static string ToContractXml<T>(this T obj, DataContractSerializer serializer = null, XmlWriterSettings settings = null)

        {

            serializer = serializer ?? new DataContractSerializer(obj == null ? typeof(T) : obj.GetType());

            using (var textWriter = new StringWriter())

            {

                settings = settings ?? new XmlWriterSettings { Indent = true };

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

                {

                    serializer.WriteObject(xmlWriter, obj);

                }

                return textWriter.ToString();

            }

        }

​

        public static T FromContractXml<T>(string xml, DataContractSerializer serializer = null)

        {

            using (var textReader = new StringReader(xml ?? ""))

            using (var xmlReader = XmlReader.Create(textReader))

            {

                return (T)(serializer ?? new DataContractSerializer(typeof(T))).ReadObject(xmlReader);

            }

        }

    }

​

    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;

        }

    }

​