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

​

//How to serialize a stack<T> with System.Text.Json

​

    class TestClass

    {

        public static void Test()

        {

            var stack = new Stack<int>(new [] { 1, 2, 3 });

​

            var json = JsonSerializer.Serialize(stack);

            var stack2 = JsonSerializer.Deserialize<Stack<int>>(json);

            var json2 = JsonSerializer.Serialize(stack2);

            Console.WriteLine("Serialized {0}:", stack);

            Console.WriteLine(json); // Prints [3,2,1]

            Console.WriteLine("Round-tripped {0}:", stack);

            Console.WriteLine(json2); // Prints [1,2,3]

            Assert.IsTrue(stack.SequenceEqual(stack2)); // Fails

            Assert.IsTrue(json == json2);               // Also fails

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("System.Text.Json: " + 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;

        }

    }

​