public IHttpActionResult RsvpToEvent([FromBody] EventRsvpDto eventRsvp) { if (ModelState.IsValid) { return(Authorized(token => { try { _eventService.RegisterForEvent(eventRsvp, token); return Ok(); } catch (Exception e) { var apiError = new ApiErrorDto("Save Event Rsvp", e); throw new HttpResponseException(apiError.HttpResponseMessage); } })); } var errors = ModelState.Values.SelectMany(val => val.Errors).Aggregate("", (current, err) => current + err.Exception.Message); var dataError = new ApiErrorDto("Event Data Invalid", new InvalidOperationException("Invalid Event Data" + errors)); throw new HttpResponseException(dataError.HttpResponseMessage); }