public Card GetCardEntity(BioService.Card proto)
    {
      if (proto == null)
        return null;

      Card entity = new Card();

      entity.Id = proto.Id;
      entity.Unique_Number = proto.UniqueNumber;
      entity.Person_Id = proto.Personid;

      return entity;
    }
    public BioService.Card GetCardProto(Card entity)
    {
      if (entity == null)
        return null;

      BioService.Card proto = new BioService.Card();

      proto.Id = entity.Id;
      proto.UniqueNumber = entity.Unique_Number;

      if (entity.Person_Id.HasValue)
        proto.Personid = entity.Person_Id.Value;

      return proto;
    }