public void AddNewBook()
        {
            Console.WriteLine("Enter Book Name, Category and Quantity");
            string name     = Console.ReadLine();
            string category = Console.ReadLine();
            int    qty      = Int32.Parse(Console.ReadLine());
            Guid   id       = bookDomainoperation.GenerateBookID();

            Book newbook = new Book
            {
                BookID   = id,
                BookName = name,
                Category = category,
                Qty      = qty
            };

            bookrepo.AddBooktoRepo(newbook);
        }