// method with implemntation
        public void GetInventory()
        {
            Chair c = new Chair();

            // I need all tools and parts of chair

            foreach (var tools in c.GetTools())
            {
                Console.WriteLine("Tools:" + tools);
            }
            foreach (var parts in c.GetParts())
            {
                Console.WriteLine("Parts:" + parts);
            }
        }