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 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/53368034/jsonconvert-serialize-deserialize-jagged-array

​

    class TestClass

    {

        public static void Test()

        {

            Test1d();

            Test2d();

            Test3d();

        }

​

        private static void Test3d()

        {

            var root = new double[,,] { { { 1 } } };

​

            TestArray<double>(root);

        }

        private static void Test2d()

        {

            var root = new double[,] { { 1 } };

            TestArray<double>(root);

        }

        private static void Test1d()

        {

            var root = new double[] { 1 };

            TestArray<double>(root);

        }

        static void TestArray<T>(System.Array root)

        {

            var settings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Arrays };

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

​

            Console.WriteLine("\nTesting an array of type {0}:", root.GetType());

            Console.WriteLine(json);

​

            // Try to deserialize to the same type as root

            // but get an exception instead:

            var root2 = JsonConvert.DeserializeAnonymousType(json, root, settings);

​

            // Taken from this answer https://stackoverflow.com/a/12446807

            // to https://stackoverflow.com/questions/12446770/how-to-compare-multidimensional-arrays-in-c-sharp

            // by https://stackoverflow.com/users/287107/user287107

            Assert.IsTrue(

                root.Rank == root2.Rank &&

                Enumerable.Range(0, root.Rank).All(dimension => root.GetLength(dimension) == root2.GetLength(dimension)) &&

                root.Cast<T>().SequenceEqual(root2.Cast<T>())

                );

            Console.WriteLine("Array round-tripped successfully.");

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​