Simple code to convert SendGrid's ridiculous Event API into usable C# objects.

SendGridController.cs

        public ActionResult Index()
        {
            var json = new StreamReader(Request.InputStream).ReadToEnd();
            //RWM: The next line turns the faux-array into an actual one.
            json = string.Format("[{0}]", json.Replace("}" + Environment.NewLine + "{", "},{"));
            var models = JsonConvert.DeserializeObject<List<SendGridEventModel>>(json);
            models.ForEach(c => ProcessEvent(c));
            return new HttpStatusCodeResult(HttpStatusCode.OK);
        }

SendGridEventModel.cs

    public class SendGridEventModel
    {

        /// <summary>
        /// Applies to all message types.
        /// </summary>
        public string Category { get; set; }

        /// <summary>
        /// Applies to all message types.
        /// </summary>
        public string Event { get; set; }

        /// <summary>
        /// Applies to all message types.
        /// </summary>
        public string Email { get; set; }

        /// <summary>
        /// Applies to Deferred and Delivered events.
        /// </summary>
        public string Response { get; set; }

        /// <summary>
        /// Applies to the Deferred event.
        /// </summary>
        public int Attempt { get; set; }

        /// <summary>
        /// Applies to the Bounce and Drop events
        /// </summary>
        public string Reason { get; set; }

        /// <summary>
        /// Applies to the Click event.
        /// </summary>
        public string Url { get; set; }

        /// <summary>
        /// 3 digit status code. Applies to the Bounce event.
        /// </summary>
        public int Status { get; set; }

        /// <summary>
        /// Applies to the Bounce event.
        /// </summary>
        public string Type { get; set; }

        /// <summary>
        /// 
        /// </summary>
        public Int64 TimeStamp { get; set; }
    }