public async Task <long?> CreateNewList(CreateListDto createListDto) { var count = await _listsRepository.GetCountListsInBoard(createListDto.BoardId); var list = new List() { Name = createListDto.Name, BoardId = createListDto.BoardId, Position = count }; _listsRepository.Insert(list); await _listsRepository.SaveChangesOnContext(); return(createListDto.BoardId); }