protected void Page_Load(object sender, EventArgs e)
        {
            User user = (User)Session["user"];

            if (!string.IsNullOrEmpty(Request.QueryString["Delete"]) && (User)Session["user"] != null && ((User)Session["user"]).IsAdmin)
            {
                var isInt = int.TryParse(Request.QueryString["Delete"], out int id);
                if (isInt)
                {
                    var brandBll = new BrandBll();
                    try
                    {
                        brandBll.DeleteBrand(id);
                        Response.Redirect("Brands.aspx");
                    }
                    catch (Exception exception)
                    {
                        error.InnerText = exception.Message;
                    }
                }
            }

            RenderGrid();
        }