public IActionResult GetTrailInNationalPark(int nationalId) { var objList = _trailRepository.GetTrailInNationalPark(nationalId); if (objList == null) { return(NotFound()); } var objDto = new List <TrailDto>(); foreach (var obj in objList) { objDto.Add(_mapper.Map <TrailDto>(obj)); } return(Ok(objDto)); }