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.Text.Json;

using System.Text.Json.Serialization;

using System.Collections.Immutable;

​

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

​

//https://stackoverflow.com/questions/72268018/jsonconstructor-fails-on-ienumerable-property

​

[Serializable]

     public class LocalStorageData

        {

           public LocalStorageData() {

           }

            public LocalStorageData(DateTimeOffset added, TimeSpan timeSpan, object data)

            {

                Added = added;

                Duration = timeSpan;

                Data = data;

            }

            public DateTimeOffset Added { get; set; }

            public TimeSpan Duration { get; set; }

            public object Data { get; set; }

        }

​

    class TestClass

    {

        public static void Test()

        {

            string json = JsonSerializer.Serialize(new LocalStorageData(DateTimeOffset.Now, TimeSpan.FromMinutes(5), 1));

            var test = JsonSerializer.Deserialize<LocalStorageData>(json);

            test.Dump();

        }   

    }

​

    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("System.Text.Json version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​