public bool finish(int id)
        {
            var construction = ConstructionRepository.find(id);

            if (construction.Status != "In progress of constructing")
            {
                return(false);
            }

            ConstructionRepository.finish(construction);
            return(true);
        }
        public bool start(int id)
        {
            var construction = ConstructionRepository.find(id);

            if (construction.Status != "Waiting for constructing")
            {
                return(false);
            }

            ConstructionRepository.start(construction);
            return(true);
        }