public static void Register(HttpConfiguration config) { // Web API configuration and services InitDb.UpdateDatabase(); var json = config.Formatters.JsonFormatter; json.SerializerSettings.PreserveReferencesHandling = Newtonsoft.Json.PreserveReferencesHandling.All; json.SerializerSettings.Formatting = Formatting.None; config.Formatters.Remove(config.Formatters.XmlFormatter); // Web API routes config.MapHttpAttributeRoutes(); }