private void Btn_CpyOrder_Click(object sender, RoutedEventArgs e)
        {
            Customer customer = Lbx_Customers.SelectedItem as Customer;

            if (customer == null)
            {
                MessageBox.Show("Select Customer before adding an order", "Famous Bakers", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
            else
            {
                Order selectedOrder = Lbx_Orders.SelectedItem as Order;
                if (selectedOrder == null)
                {
                    MessageBox.Show("Please select an order to copy", "Famous Bakers", MessageBoxButton.OK, MessageBoxImage.Error);
                    return;
                }
                Order newOrder = new Order
                {
                    id              = Math.Abs(Guid.NewGuid().GetHashCode()).ToString(),
                    custId          = selectedOrder.custId,
                    deliveryAddress = selectedOrder.deliveryAddress,
                    deliveryType    = selectedOrder.deliveryType,
                    orderItems      = selectedOrder.orderItems,
                };
                App._orders.Add(newOrder);
                ObservableCollection <Order> orderList = new ObservableCollection <Order>(from order in App._orders
                                                                                          where order.custId == customer.id
                                                                                          select order);
                Lbx_Orders.SelectedItem = null;
                Lbx_Orders.ItemsSource  = orderList;
                Lbx_Orders.SelectedItem = newOrder;
                Lbx_Orders.ScrollIntoView(newOrder);
            }
        }
        // Order

        private void Btn_AddOrder_Click(object sender, RoutedEventArgs e)
        {
            Customer customer = Lbx_Customers.SelectedItem as Customer;

            if (customer == null)
            {
                MessageBox.Show("Select Customer before adding an order", "Famous Bakers", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
            else
            {
                Order newOrder = new Order
                {
                    id           = Math.Abs(Guid.NewGuid().GetHashCode()).ToString(),
                    custId       = customer.id,
                    orderDate    = DateTime.Now,
                    deliveryType = "In Store"
                };
                App._orders.Add(newOrder);
                ObservableCollection <Order> orderList = new ObservableCollection <Order>(from order in App._orders
                                                                                          where order.custId == customer.id
                                                                                          select order);
                Lbx_Orders.ItemsSource  = orderList;
                Lbx_Orders.SelectedItem = newOrder;
                Lbx_Orders.ScrollIntoView(newOrder);
            }
        }