using System;

using Newtonsoft.Json;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string json = @"{

                      'data': {

                        '4': {

                          'id': '12',

                          'email': 'lachlan12@somedomain.com',

                          'first_name': 'lachlan',

                          'type':'changed'

                          },

                        '5': {

                          'id': '15',

                          'email': 'appuswamy15email@somedomain.com',

                          'first_name': 'appuswamy',

                          'type':'changed'

                          }

                       }

                    }";

        var data = JsonConvert.DeserializeObject<RootObject>(json);

        Console.WriteLine("# of items deserialized : {0}", data.DataItems.Count);

        foreach ( var item in data.DataItems)

        {

            Console.WriteLine("  Item Key {0}: ", item.Key);

            Console.WriteLine("    id: {0}", item.Value.id);

            Console.WriteLine("    email: {0}", item.Value.email);

            Console.WriteLine("    first_name: {0}", item.Value.first_name);

            Console.WriteLine("    Type: {0}", item.Value.type);

        }

    }

}

​

public class RootObject

{

    [JsonProperty(PropertyName = "data")]

    public Dictionary<string,DataItem> DataItems { get; set; }

}

​

public class DataItem

{

    public string id { get; set; }

    public string email { get; set; }

    public string first_name { get; set; }

    public string type { get; set; }

}