public ActionResult Details(int instructionDtoId)
        {
            var instructionDto       = instructionService.Get(instructionDtoId);
            var instructionViewModel = Mapper.Map <InstructionViewModel>(instructionDto);

            instructionViewModel.Pages = instructionPageService.GetAll(instructionDtoId);

            return(View("InstructionDetails", instructionViewModel));
        }
        public IHttpActionResult Get(int id)
        {
            var instructionDto = instructionService.Get(id);

            if (instructionDto == null)
            {
                return(NotFound());
            }

            return(Ok(instructionDto));
        }