private async void onOrder(object sender, EventArgs e)
        {
            try
            {
                ProductModel product = viewModel.Item;


                OrderDto newOrder = new OrderDto
                {
                    Category    = product.Category,
                    Number      = Convert.ToInt32(txtAmount.Text),
                    Customer    = "Me",
                    CustomerId  = "1",
                    Description = product.Description,
                    Price       = product.Price,
                    Product     = product.Title,
                    isShipped   = false,
                    OrderDate   = new DateTime()
                };


                viewModel.SaveOrderCommand(newOrder);

                await DisplayAlert("", "Order is successed", "OK");
            }
            catch (Exception exc)
            {
                DisplayAlert("", exc.Message, "OK");
            }
        }