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 Newtonsoft.Json.Schema; //https://www.newtonsoft.com/jsonschema/help/html/Introduction.htm

using Newtonsoft.Json.Schema.Generation;

​

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

​

//https://stackoverflow.com/questions/67232936/jschemagenerator-multidimensional-array

​

    public class MyClass 

    {

        public int[,] MyProperty { get; set; }

​

        public string[,,,] MyProperty4D { get; set; }

    }

​

    public class MultidimensionalArraySchemaProvider : JSchemaGenerationProvider

    {

        public override JSchema GetSchema(JSchemaTypeGenerationContext context)

        {

            if (CanGenerateSchema(context))

            {

                // Create a jagged N-d array type.

                var type = context.ObjectType.GetElementType().MakeArrayType();

                for (int i = context.ObjectType.GetArrayRank(); i > 1; i--)

                    // Disallow null array items for outer arrays

                    // context.Generator.DefaultRequired controls whether null is allowed for innermost array items.

                    type = typeof(ArrayRow<>).MakeGenericType(type);

                // Return a schema for the jagged N-d array type.

                return context.Generator.Generate(type);

            }

            else

                throw new NotImplementedException();

        }

        public override bool CanGenerateSchema(JSchemaTypeGenerationContext context) => 

            context.ObjectType.IsArray && context.ObjectType.GetArrayRank() > 1;

    }

​

    [JsonArray(AllowNullItems = false)]

    class ArrayRow<T> : List<T> { }

​

    class TestClass

    {

        public static void Test()

        {

            var generator = new JSchemaGenerator();

            generator.GenerationProviders.Add(new MultidimensionalArraySchemaProvider());

            //generator.SchemaIdGenerationHandling = SchemaIdGenerationHandling.FullTypeName;

            //generator.SchemaLocationHandling = SchemaLocationHandling.Definitions;

            var schema = generator.Generate(typeof(MyClass));           

            Console.WriteLine(schema);

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

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

            Console.WriteLine("Json.NET Schema version: " + typeof(Newtonsoft.Json.Schema.JSchema).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;

        }

    }

​