private void ButtonAdd_Click(object sender, RoutedEventArgs e) { if (SubscriptionName.Value.Trim() == "" || SubscriptionURI.Value.Trim() == "") { return; } Subscriptions.Insert(Subscriptions.Count - 1, new Subscription(Main, SubscriptionName.Value, SubscriptionURI.Value, false, DateTime.MinValue)); Main.Save(); Close(); }