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.Dynamic;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using Moq;

​

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

​

//https://stackoverflow.com/questions/77231327/how-to-serialize-a-castle-dynamic-proxy-interface-using-newtonsoft-json

​

    // Define other methods and classes here

    public interface IConfig

    {

        string Key { get; set; }

    }

​

    class TestClass

    {

        static void ShowExplicitImplementations(Type concreteType, Type ifaceType)

        {

            InterfaceMapping map = concreteType.GetInterfaceMap(ifaceType);

            for (int i = 0; i < map.InterfaceMethods.Length; i++)

            {

                MethodInfo ifaceMethod = map.InterfaceMethods[i];

                MethodInfo targetMethod = map.TargetMethods[i];

                Console.WriteLine(String.Format("{0} maps to {1}", ifaceMethod, targetMethod));

            }

        }

        public static void Test()

        {

            var config = new Mock<IConfig>();

            config.Setup(x => x.Key).Returns("test");

            var proxy = config.Object;

            var contract = (new DefaultContractResolver()).ResolveContract(proxy.GetType());

            Console.WriteLine(proxy.GetType());

            if (contract is JsonObjectContract objContract)

                foreach (var property in objContract.Properties)

                    Console.WriteLine("  {0}: {1}", property.UnderlyingName, property.PropertyType);

            Console.WriteLine();

​

            var json = JsonConvert.SerializeObject(proxy, Newtonsoft.Json.Formatting.Indented);

            json.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("{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;

            }

        }

    }

​