private void CreateOrderButtonClick(object sender, RoutedEventArgs e)
{
OrderPageWindow orderPage = new OrderPageWindow();
orderPage.Show();
this.Close();
}
private void OpenOrderButtonClick(object sender, RoutedEventArgs e)
{
OrderPageWindow orderPage = new OrderPageWindow();
orderPage.ProductsInOrderExpander.Visibility = Visibility.Hidden;
orderPage.ProductsInOrderExpander.IsEnabled = false;
orderPage.ProductsInOrderExpander.IsExpanded = false;
orderPage.Show();
this.Close();
}