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 Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

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

​

//https://stackoverflow.com/questions/65175144/is-newtonsoft-typenamehandling-all-with-a-basic-namespace-check-safe

​

    public class Root<TBase>

    {

        [JsonProperty(TypeNameHandling = TypeNameHandling.Auto)]

        public TBase Data { get; set; }

    }

​

    public class MySerializationBinder : DefaultSerializationBinder

    {

        const string MyNamespace = "foo"; //'foo' is our company name, all our namespaces start with foo

        public override Type BindToType(string assemblyName, string typeName)

        {

            if (!typeName.StartsWith(MyNamespace, StringComparison.OrdinalIgnoreCase))

                throw new JsonSerializationException($"Request type {typeName} not supported, please use an IFoo");

            var type = base.BindToType(assemblyName, typeName);

            return type;

        }

    }

​

    namespace foo

    {

    public interface IFoo { }

​

    public class Foo1: IFoo 

    {

        public IList<string> Items { get; set; } = new List<string>();

    }

​

    public class Foo2: IFoo { }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var settings = new JsonSerializerSettings

            {

                SerializationBinder = new MySerializationBinder(),

                TypeNameHandling = TypeNameHandling.None,

            };

            var json = JsonConvert.SerializeObject(new Root<foo.IFoo> { Data = new foo.Foo1 { Items = { "Hello" } } }, settings);

            Console.WriteLine(json);

            var foo = JsonConvert.DeserializeObject<Root<foo.IFoo>>(json, settings)?.Data;

            Assert.AreEqual(typeof(foo.Foo1), foo.GetType());

        }   

    }

​

    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;

        }

    }

​