private void btnViewProductDetails_Click(object sender, RoutedEventArgs e)
        {
            ProductStocksModel ps = dgvProductStocks.SelectedItem as ProductStocksModel;

            if (ps != null)
            {
                ProductsBreakdown pb = new ProductsBreakdown(this, ps);
                pb.ShowDialog();
            }
            else
            {
                MessageBox.Show("Please select record!");
            }
        }