using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        JObject j2 = JObject.FromObject(new { nestedkey1 = "value1", nestedkey2 = "value2" });

        JObject j = JObject.FromObject(new {key1 = "value1", key2 = "value2", key3 = j2});

        string json = JsonConvert.SerializeObject(j);

        Console.WriteLine(json);

​

    }

}

​

​