C# Json.Net serialize Dictionary<string, object>, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Dictionary<string, object> points = new Dictionary<string, object>
            {
                { "James", 9001 },
                { "Jo", "This is a string" },
                { "Jess", null }
            };
            points.Add("array", new object[]{"a", "b", 3});

string json = JsonConvert.SerializeObject(points, Formatting.Indented);

Console.WriteLine(json);
            // {
            //   "James": 9001,
            //   "Jo": 3474,
            //   "Jess": 11926
            //   "array": [
            //     "a",
            //     "b",
            //     3
            //   ]
            // }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,33 sec, cpu time: 0,33 sec, average memory usage: 23 Mb, average nr of threads: 4