private void OnPanelClick(object sender, EventArgs e)
 {
     string[] name = ((Button)sender).Name.Split('-');
     if (int.Parse(name[1]) != lastbutton)
     {
         Magazine magazine = Magazine.CreateFromID(int.Parse(name[1]));
         item.Product      = magazine;
         item.Quantity     = 1;
         lblName.Text      = magazine.Name;
         lblIssue.Text     = magazine.Issue;
         lblType.Text      = magazine.Type;
         lblPublisher.Text = magazine.Publisher;
         lblPage.Text      = magazine.Page.ToString();
         lblQty.Text       = item.Quantity.ToString();
         lblPrice.Text     = "€" + (item.Quantity * item.Product.Price).ToString("0.00");
     }
     lastbutton = int.Parse(name[1]);
 }