using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

              ""id"": ""53234..."",

              ""first_name"": ""Nik"",

              ""last_name"": ""Westfield"",

              ""email"": ""nik@youremail.com"",

              ""picture"": {

                ""data"": {

                  ""height"": 720,

                  ""is_silhouette"": false,

                  ""url"": ""https://scontent.xx.fbcdn.net/v/t1.0-1/p720x720/3221....."",

                  ""width"": 720

                }

              }

            }";

        FacebookMeDto me = JsonConvert.DeserializeObject<FacebookMeDto>(json);

        Console.WriteLine("height: " + me.PictureDto.Height);

        Console.WriteLine("url: " + me.PictureDto.Url);

    }

}

​

public class FacebookMeDto

{

    [JsonProperty("id")]

    public string Id { get; set; }

    [JsonProperty("picture")]

    [JsonConverter(typeof(FacebookPictureDtoConverter))]

    public FacebookPictureDto PictureDto { get; set; }

}

​

public class FacebookPictureDto

{

    [JsonProperty("height")]

    public int Height { get; set; }

    [JsonProperty("url")]

    public string Url { get; set; }

}

​

public class FacebookPictureDtoConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        return objectType == typeof(FacebookPictureDto);

    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

    {

        JObject obj = JObject.Load(reader);

        FacebookPictureDto dto = new FacebookPictureDto();

        serializer.Populate(obj["data"].CreateReader(), dto);

        return dto;

    }

    public override bool CanWrite

    {

        get { return false; }

    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

    {

        throw new NotImplementedException();

    }

}

​