using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

​

using System.Text.Json;

using System.Text.Json.Serialization;

​

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

​

//https://stackoverflow.com/questions/66495660/net-5-0-signature-change-of-system-text-json-jsonserializer-deserialize

​

    class ClassA

    {

        public string[] ArrayOfString { get; set; }

    }

​

    class ClassB : BaseClass

    {

        public string[] ArrayOfString

        {

            get => new string[] { base.SingularString };

            set

            {

                if((value != null) && (value.Length == 1))

                {

                    base.SingularString = value[0];

                }

            }

        }

    }

    class BaseClass

    {

        public string SingularString { get; set; } = "Hello World";

    }   

​

    class TestClass

    {

        public static void Test()

        {

            var classA = new ClassA { ArrayOfString  = new [] { "Hello World" } };

            var json = JsonSerializer.Serialize(classA);

            Console.WriteLine(json);

            var classA2 = JsonSerializer.Deserialize<ClassA>(json);

            classA2.Dump();

            var classB = JsonSerializer.Deserialize<ClassB>(json);

            classB.Dump();

            Assert.That(classA.ArrayOfString.SequenceEqual(classB.ArrayOfString));

        }   

    }

​

    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;

            }

        }

    }

​