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.Collections.ObjectModel;

using System.Runtime.Serialization;

​

using ServiceStack.Text;

​

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

​

//https://stackoverflow.com/questions/66048759/servicestack-deserialize-int-unix-timestamp-to-datetime

​

    [DataContract]

    public class MyClass

    {

        //... (other members working fine)

​

        [DataMember(Name = "t")]

        public DateTime Timestamp { get; set; }

    }

​

    class TestClass

    {

        public static void Test()

        {

            ServiceStack.Text.JsConfig<MyClass>.OnSerializingFn = o => { Console.WriteLine("OnSerializingFn called"); return o; };

            ServiceStack.Text.JsConfig<MyClass>.OnDeserializingFn = (o, _, _) => { Console.WriteLine("OnDeserializingFn called"); return o; };

​

            Console.WriteLine();

            TestDeserialize();

        }

        public static void TestDeserialize()

        {

            var message = "[{\"t\":1612446479354}]";

            using var config = JsConfig.With(new Config {DateHandler = DateHandler.UnixTimeMs});

            //var myClass = message.FromJson<MyClass[]>();

            var ticks = JsonSerializer.DeserializeFromString<MyClass[]>(message);

            Console.WriteLine(ticks[0].Timestamp);

​

            Assert.IsTrue(ticks[0].Timestamp == DateTimeOffset.FromUnixTimeMilliseconds(1612446479354).LocalDateTime);

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Assembly.GetName().Name,  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.Location.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;

        }

    }

​