public CategoryController(IConversation conversation, IMappingEngine mapper, CategoryRepository repository, IValidator validator, IStringConverter<Category> stringConverter)
 {
     _conversation = conversation;
     _mapper = mapper;
     _repository = repository;
     _validator = validator;
     _stringConverter = stringConverter;
 }
 public CategoryStringConverter(CategoryRepository repository)
 {
     _repository = repository;
 }