public JsonResult <IDtoOutObjects> New(DtoInGetNewMessages dtoInGetNewMessages) { if (ModelState.IsValid) { return(Json(_messageModel.GetNewMessages(dtoInGetNewMessages))); } DtoOutError error = new DtoOutError(); error.Exception = new ObjectIsNotValidException("SeenMessage"); error.Message = "Seenmessage is not valid"; return(Json((IDtoOutObjects)error)); }