using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Diagnostics;

using System.IO;

using System.Reflection;

using System.ComponentModel;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;

​

​

    public class RootObject

    {

        public ICollection collection { get; set; }

    }

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("");

            var list = new ArrayList();

            list.Add(new Dictionary<string, string> { { "a", "b" } });

            list.Add(3.14);

            list.Add("hello");

            var obj = new RootObject { collection = list };

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

            Console.WriteLine(json);

        }

    }

​