private void searchButton_Click(object sender, RoutedEventArgs e)
        {
            UserControl usc = null;

            GridResult.Children.Clear();
            Product product = new Product();

            product = DataBaseSolution.SearchProduct((ProductName.Text).ToString());
            if (product.Name != null)
            {
                ProductName.Clear();
                usc = new UserControlPositiveSearchResult(product);
                GridResult.Children.Add(usc);
            }
            else
            {
                usc = new UserControlNegativeSearchResult();
                GridResult.Children.Add(usc);
            }
        }