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.Xml;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

// https://stackoverflow.com/questions/47119821/net-system-datetime-tolocaltime-returns-invalid-local-time-value

​

    public class RootObject

    {

        public DateTime foo { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var json = GetJson();

            Console.WriteLine("Input JSON: ");

            Console.WriteLine(json);

​

            foreach (DateTimeZoneHandling handling in Enum.GetValues(typeof(DateTimeZoneHandling)))

            {

                Console.WriteLine("\nTesting DateTimeZoneHandling.{0}:", handling);

​

                var settings = new JsonSerializerSettings

                {

                    DateTimeZoneHandling = handling,

                };

​

                var root = JsonConvert.DeserializeObject<RootObject>(json, settings);

​

                Console.WriteLine("foo.Kind = {0}, Round-trip XML value = {1}, UTC XML value = {2}",

                                  root.foo.Kind,

                                  XmlConvert.ToString(root.foo, XmlDateTimeSerializationMode.RoundtripKind),

                                  XmlConvert.ToString(root.foo, XmlDateTimeSerializationMode.Utc));

                var newJson = JsonConvert.SerializeObject(root);

                Console.WriteLine(newJson);

​

            }

​

            Console.WriteLine("\nDone testing.");

        }

        static string GetJson()

        {

            var json = @"{

    ""foo"": ""2017-11-05T08:30:00""

}";

            return json;

        }

    }

​

​

    public class Program

    {

        public static void Main()

        {

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

            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 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");

        }

    }

​