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 Newtonsoft.Json.Bson;

​

using MongoDB.Bson.IO;

using MongoDB.Bson;

using MongoDB.Bson.Serialization.Serializers;

using MongoDB.Bson.Serialization;

​

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

​

//https://stackoverflow.com/questions/62080252/convert-newtosoft-jobject-directly-to-bsondocument

​

    class TestClass

    {

        public static void Test()

        {

            var json = "{\"name\":\"value\"}";

            var jObject = JObject.Parse(json);

​

            using var stream = new MemoryStream(); // Or open a FileStream if you prefer

            using (var writer = new BsonDataWriter(stream) { CloseOutput = false })

            {

                jObject.WriteTo(writer);

            }

            // Reset the stream position to 0 if you are going to immediate re-read it.

            stream.Position = 0;

            // Parse the BSON using the MongoDB driver

            BsonDocument bsonData;

            using (var reader = new BsonBinaryReader(stream))

            {

                var context = BsonDeserializationContext.CreateRoot(reader);

                bsonData = BsonDocumentSerializer.Instance.Deserialize(context);            

            }

            // Verify that the BsonDocument is semantically identical to the original JSON.

            // Write it to JSON using the MongoDB driver

            var newJson = bsonData.ToJson();

            Console.WriteLine(newJson); // Prints { "name" : "value" }

            // And assert that the old and new JSON are semantically identical

            Assert.IsTrue(JToken.DeepEquals(JToken.Parse(json), JToken.Parse(newJson))); // Passes

        }   

    }

​

    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.CodeBase.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;

        }

    }

​