public void DeletePhotosDirectory(int vehicleId, string targetFilePath)
{
// Remove all photos data of the vehicle. Delete from database.
var photos = _unitOfWork.Photos.Find(p => p.VehicleId == vehicleId);
_unitOfWork.Photos.RemoveRange(photos);
// Remove the directory and the photo files of the vehicles.
var photosDirectory = Path.Combine(targetFilePath, FilePaths.VehiclePhotosDirectory, vehicleId.ToString());
_photoStorage.DeleteDirectory(photosDirectory);
}