using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using ReflectionMagic;

​

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

​

//https://stackoverflow.com/questions/73455764/apply-isodatetimeconverter-to-incoming-request

​

    public class WriteOnlyIsoDateTimeConverter : IsoDateTimeConverter

    {

        public override bool CanRead => false;

    }

​

    class TestClass

    {

        public static void Test()

        {

            TestInner();

            using (new FakeLocalTimeZone(TimeZoneInfo.FindSystemTimeZoneById("US/Eastern")))

            {

                // In this scope, the local time zone is US/Eastern

                // Here, DateTime.Now returns 2020-09-02T02:58:46

                Assert.AreEqual("US/Eastern", TimeZoneInfo.Local.Id);

                Assert.AreEqual(TimeSpan.FromHours(-5), TimeZoneInfo.Local.BaseUtcOffset);

                TestInner();

            }           

        }

        public static void TestInner()

        {

            var json = @"""2022-08-22T13:42:27.407Z""";

​

            var jsonSettings = new JsonSerializerSettings();

            jsonSettings.Converters.Add(new WriteOnlyIsoDateTimeConverter() { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" });

            var dateTime = JsonConvert.DeserializeObject<DateTime>(json, jsonSettings);

            var json2 = JsonConvert.SerializeObject(dateTime, jsonSettings);

            Assert.AreEqual(@"""2022-08-22 13:42:27""", json2);

​

            Console.WriteLine(dateTime.Kind);

            Console.WriteLine(json2); // Prints "2022-08-22 13:42:27"

        }   

    }

​

    // From this answer https://stackoverflow.com/a/63700512

    // By https://stackoverflow.com/users/21698/0xced

    // To https://stackoverflow.com/questions/44413407/mock-the-country-timezone-you-are-running-unit-test-from

    public class FakeLocalTimeZone : IDisposable

    {

        private readonly TimeZoneInfo _actualLocalTimeZoneInfo;

​

        private static void SetLocalTimeZone(TimeZoneInfo timeZoneInfo)

        {

            typeof(TimeZoneInfo).AsDynamicType().s_cachedData._localTimeZone = timeZoneInfo;

        }

​

        public FakeLocalTimeZone(TimeZoneInfo timeZoneInfo)

        {

            _actualLocalTimeZoneInfo = TimeZoneInfo.Local;

            SetLocalTimeZone(timeZoneInfo);

        }

​

        public void Dispose()

        {

            SetLocalTimeZone(_actualLocalTimeZoneInfo);

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}), {2}", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Namespace, typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​