示例#1
0
        static void Main(string[] args)
        {
            UsefullMethods ob = new UsefullMethods();

            ob.AddCustomer("Nina", 1);
            ob.AddProduct("Orange", 20, "Voronezh");

            ob.JoinCustomerAndProduct();
            ob.GroupByCustomers();

            ob.ShowCustomers();
            ob.ShowProducts();
        }