protected void btnBuy_Click(object sender, EventArgs e)
{
var productId = Convert.ToInt32(Page.RouteData.Values["id"]);
var product = CatalogService.FindCatalogItem(productId);
orderNumber = Guid.NewGuid().ToString("N");
var properties = new Dictionary <string, string>();
properties.Add("product_id", productId.ToString());
properties.Add("order_number", orderNumber);
QueueService.BuyCatalogItem(product, properties);
divOrdered.Visible = true;
divOrderNumber.InnerText = $"Order no: {orderNumber}";
Telemetry.TrackEvent("eshop/product/buy", properties: properties);
}