void al_UrunBilgiCompleted(object sender, UrunBilgiCompletedEventArgs e)
 {
     if (e.Result != null)
     {
         lstUrunBilgi.ItemsSource = e.Result;
     }
 }
 void al_UrunBilgiCompleted(object sender, UrunBilgiCompletedEventArgs e)
 {
     if (e.Result != null)
     {
         lstUrunBilgi.ItemsSource = e.Result;
     }
 }