using System;

using Newtonsoft.Json.Linq;

using System.Text.Json.Nodes;

​

public class Program

{

    public static void Main()

    {

        var jObject = new JObject { ["John"] = "Doe" };

        Console.WriteLine($"JObject/john: {jObject["john"]}");

        Console.WriteLine($"JObject/John: {jObject["John"]}");

        var jsonObject = new JsonObject { ["John"] = "Doe" };

        Console.WriteLine($"JsonObject/john: {jsonObject["john"]}");

        Console.WriteLine($"JsonObject/John: {jsonObject["John"]}");

    }

}