Facebook Event Serialization

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using mCMS.Controllers.Helpers;
using Newtonsoft.Json;

namespace Models.JSON
{
    public static class FacebookEvent
    {
        private class AttendingCollection
        {
            public List<Attending> data { get; set; }
        }

        private class Attending
        {
            public String name { get; set; }
            public String id { get; set; }
            public String attending { get; set; }
        }

        private class LightEventCollection
        {
            public List<LightEvent> data { get; set; }
        }

        private class LightEvent
        {
            public String name { get; set; }
            public String start_time { get; set; }
            public String end_time { get; set; }
            public String location { get; set; }
            public String id { get; set; }
        }

        private class Event
        {
            public String id { get; set; }
            public String name { get; set; }
            public String description { get; set; }
            public String start_time { get; set; }
            public String end_time { get; set; }
            public String location { get; set; }
            public String ImageURL { get; set; }

            public Venue venue { get; set; }
            public int Attendees { get; set; }
        }

        private class Venue
        {
            public String latitude { get; set; }
            public String longitude { get; set; }
            public String id { get; set; }
        }

        private class EventViewModel
        {
            public String ID { get; set; }
            public String Description { get; set; }
            public String StartTime { get; set; }
            public String EndTime { get; set; }
            public String ImageURL { get; set; }
            public String Name { get; set; }
            public Venue Venue { get; set; }
            public int Attendees { get; set; }
        }

        private class EventViewModelCollection
        {
            public List<EventViewModel> events { get; set; }
        }

        public static String GetEventViewModels(String stream, String authToken)
        {
            var lightWeightEvents = JsonConvert.DeserializeObject<LightEventCollection>(stream);
            var events = GetEventsGraph(lightWeightEvents.data.ToList(), authToken);
            var viewModels = events.Select(item => new EventViewModel()
                                                       {
                                                           ID = item.id,
                                                           Description = item.description,
                                                           StartTime = item.start_time,
                                                           EndTime = item.end_time,
                                                           Name = item.name,
                                                           ImageURL = item.ImageURL,
                                                           Venue = item.venue,
                                                           Attendees = item.Attendees
                                                       }).ToList();
             viewModels.Sort((x, y) => DateTime.Parse(x.StartTime).CompareTo(DateTime.Parse(y.StartTime)));
            var col = new EventViewModelCollection()
                       {
                           events = viewModels
                       };

            return JsonConvert.SerializeObject(col);
        }

        private static IEnumerable<Event> GetEventsGraph(IEnumerable<LightEvent> lightEvents, String authToken)
        {
            var events = new List<Event>();
            foreach (var lightEvent in lightEvents)
            {
                var stream = WebStream.GetWebStream("https://graph.facebook.com/" + lightEvent.id + "&" + authToken);
                var detailedEvent = JsonConvert.DeserializeObject<Event>(stream);
                detailedEvent.ImageURL = WebStream.GetFacebookImage("https://graph.facebook.com/" + lightEvent.id + "/picture&" + authToken);

                //Get the amount of people signed up for the event
                var attendee = WebStream.GetWebStream("https://graph.facebook.com/" + lightEvent.id + "/attending?limit=999999&" + authToken);
                var attendees = JsonConvert.DeserializeObject<AttendingCollection>(attendee);
                detailedEvent.Attendees = attendees.data.Select(m => m.attending == "attending").Count();

                events.Add(detailedEvent);
            }
            return events;
        }
    }
}