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/65216886/system-invalidcastexception-unable-to-cast-object-of-type-system-int32-to-typ

​

    class TestClass

    {

        public static void Test()

        {

            TestSucceeds();

            TestFails();

        }

​

        public static void TestSucceeds()

        {

            Tuple<IEnumerable,IEnumerable> filters = new Tuple<IEnumerable,IEnumerable>(

                // This works!

                new object [] { "1" }.Select(s => Convert.ChangeType(s, typeof(int), NumberFormatInfo.InvariantInfo)), 

                new object [] { "1" });

​

            string message = JsonConvert.SerializeObject(

                new

                {

                    op = 1030,

                    payload = new

                    {

                        sensorIds = new List<string>(),

                        extSensorIds = filters.Item2,

                        ruleIds = new List<string>(),

                        objectTypes = new List<string>(),

                        behaviourTypes = filters.Item1

                    },

                }

                );

​

            Console.WriteLine(message);

        }   

        public static void TestFails()

        {

            Tuple<IEnumerable,IEnumerable> filters = new Tuple<IEnumerable,IEnumerable>(

                // This fails!

                new object [] { "1" }.Select(s => (int)s),                            

                new object [] { "1" });

​

            string message = JsonConvert.SerializeObject(

                new

                {

                    op = 1030,

                    payload = new

                    {

                        sensorIds = new List<string>(),

                        extSensorIds = filters.Item2,

                        ruleIds = new List<string>(),

                        objectTypes = new List<string>(),

                        behaviourTypes = filters.Item1

                    },

                }

                );

​

            Console.WriteLine(message);

        }   

    }

​

    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;

        }

    }

​