public void AddTravelRoutePicture(Guid travelRouteId, TravelRoutePicture travelRoutePicture)
 {
     if (travelRouteId == Guid.Empty)
     {
         throw new ArgumentNullException(nameof(travelRouteId));
     }
     if (travelRoutePicture == null)
     {
         throw new ArgumentNullException(nameof(travelRoutePicture));
     }
     travelRoutePicture.TravelRouteId = travelRouteId;//
     _context.TravelRoutePictures.Add(travelRoutePicture);
 }
 public void DeleteTravelRoutePicture(TravelRoutePicture picture)
 {
     _context.TravelRoutePictures.Remove(picture);
 }