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.Runtime.Serialization;

using System.Security.Permissions;

​

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/75739618/exception-is-not-deserialized-correctly-from-string-when-using-json-net

​

    [Serializable]

    public class InternalException : Exception, ISerializable

    { 

        protected InternalException(SerializationInfo info, StreamingContext context) 

            : base(info, context) // ADD THIS

        {  }

​

        // Remainder unchanged

​

        public InternalException() 

            : base()    

        { }

​

        public InternalException(string message)

            : base(message)

        { }

​

        public InternalException(string message, Exception innerException)

            : base(message, innerException)

        { }

​

        [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]

        public override void GetObjectData(SerializationInfo info, StreamingContext context)

        {

            base.GetObjectData(info, context);

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            try

            {

                throw new InternalException("some message");

            }

            catch (InternalException ex)

            {

                var json = JsonConvert.SerializeObject(ex, Formatting.Indented);

                Console.WriteLine(json);

                var ex2 = JsonConvert.DeserializeObject<InternalException>(json);

                Console.WriteLine(ex2);

                var json2 = JsonConvert.SerializeObject(ex2, Formatting.Indented);

                //Console.WriteLine(json2);

​

                Assert.That(JToken.DeepEquals(JToken.Parse(json), JToken.Parse(json2)));

                Assert.AreEqual(ex.Message, ex2.Message);

​

                Assert.AreNotEqual(ex.Message, new InternalException(), ex.Message);

            }

        }   

    }

​

    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("{0} version: {1}", typeof(JsonSerializer).Namespace, typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​