using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

using System.Xml;

using System.Xml.Linq;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

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

​

//https://stackoverflow.com/questions/58530977/how-to-prevent-date-time-conversion-while-converting-a-json-string-to-xml-do

​

    public static partial class JsonExtensions

    {

        public static XmlDocument DeserializeXmlNode(string json, DateParseHandling dateParseHandling, 

                                                     string deserializeRootElementName = null, bool writeArrayAttribute = false, bool encodeSpecialCharacters = false)

        {

            var settings = new JsonSerializerSettings

            {

                Converters = 

                { 

                    new Newtonsoft.Json.Converters.XmlNodeConverter() 

                    {

                        DeserializeRootElementName = deserializeRootElementName,

                        WriteArrayAttribute = writeArrayAttribute,

                        EncodeSpecialCharacters = encodeSpecialCharacters

                    } 

                },

                DateParseHandling = dateParseHandling,

            };

​

            return JsonConvert.DeserializeObject<XmlDocument>(json, settings);

        }

    }

​

    public static partial class JsonExtensions

    {

        public static XDocument DeserializeXNode(string json, DateParseHandling dateParseHandling, 

                                                     string deserializeRootElementName = null, bool writeArrayAttribute = false, bool encodeSpecialCharacters = false)

        {

            var settings = new JsonSerializerSettings

            {

                Converters = 

                { 

                    new Newtonsoft.Json.Converters.XmlNodeConverter() 

                    {

                        DeserializeRootElementName = deserializeRootElementName,

                        WriteArrayAttribute = writeArrayAttribute,

                        EncodeSpecialCharacters = encodeSpecialCharacters

                    } 

                },

                DateParseHandling = dateParseHandling,

            };

​

            return JsonConvert.DeserializeObject<XDocument>(json, settings);

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            Test1();

            Console.WriteLine();

            Test2();

            Console.WriteLine();

            Test3();

            // Assert that the two strings you saw in your XML were actually the same UTC time:

            Assert.IsTrue(DateTime.Parse("2019-10-25T07:00:00-05:00").ToUniversalTime() == DateTime.Parse("2019-10-25T08:00:00-04:00").ToUniversalTime());

        }

        public static void Test1()

        {

            var jsonString = GetJson();

            var xmlDoc = JsonExtensions.DeserializeXmlNode(jsonString, DateParseHandling.None);

​

            var xml = xmlDoc.GetOuterXml();

            Console.WriteLine(xml);

​

            Assert.IsTrue((string)JsonConvert.DeserializeObject<JToken>(jsonString, new JsonSerializerSettings { DateParseHandling = DateParseHandling.None })

                            .SelectToken("Flight.DepDateTime")

                          == XElement.Parse(xml).Element("DepDateTime").Value);

        }   

        public static void Test2()

        {

            var jsonString = GetJson();

            var xmlDoc = JsonExtensions.DeserializeXmlNode(jsonString, DateParseHandling.DateTimeOffset);

​

            var xml = xmlDoc.GetOuterXml();

            Console.WriteLine(xml);

​

            Assert.IsTrue((string)JsonConvert.DeserializeObject<JToken>(jsonString, new JsonSerializerSettings { DateParseHandling = DateParseHandling.None })

                            .SelectToken("Flight.DepDateTime")

                          == XElement.Parse(xml).Element("DepDateTime").Value);

        }   

        public static void Test3()

        {

            var jsonString = GetJson();

            var xmlDoc = JsonExtensions.DeserializeXNode(jsonString, DateParseHandling.DateTimeOffset);

​

            var xml = xmlDoc.ToString();

            Console.WriteLine(xml);

​

            Assert.IsTrue((string)JsonConvert.DeserializeObject<JToken>(jsonString, new JsonSerializerSettings { DateParseHandling = DateParseHandling.None })

                            .SelectToken("Flight.DepDateTime")

                          == XElement.Parse(xml).Element("DepDateTime").Value);

        }   

        static string GetJson()

        {

            var json = @"{

    ""Flight"": {

        ""FlightNumber"": ""747"",

        ""Source"": ""JFK"",

        ""Destination"": ""LAS"",   

        ""Status"": ""ON TIME"",

        ""DepDateTime"": ""2019-10-25T07:00:00-05:00"",

        ""Terminal"": ""2""

    }

}

";

            return json;

        }

    }

​

    public static class XmlSerializationHelper

    {

        public static string GetOuterXml(this XmlNode node, bool indent = true)

        {

            if (node == null)

                return null;

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings

                {

                    Indent = indent,

                    OmitXmlDeclaration = true,

                };

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

                {

                    node.WriteTo(xmlWriter);

                }

                return textWriter.ToString();

            }

        }

    }

​

    public class Program

    {

        public static void Main()

        {

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

            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 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;

        }

    }

​