protected void SaveButton_Click(object sender, EventArgs e)
 {
     if (Page.IsValid)
     {
         _SerialKey.SerialKeyData = SerialKeyData.Text;
         _SerialKey.Save();
         if (_ProductId > 0)
         {
             Response.Redirect("Configure.aspx?ProductId=" + _ProductId.ToString() + "&CategoryId=" + _CategoryId.ToString() + "&DigitalGoodId=" + _DigitalGoodId.ToString());
         }
         else
         {
             Response.Redirect("Configure.aspx?DigitalGoodId=" + _DigitalGoodId.ToString());
         }
     }
 }