private void buttonPagesForGroupDelete_Click(object sender, RoutedEventArgs e)
        {
            var selectedgroups = _pagescontrol._acceptablePagesGroups.FirstOrDefault(x => x.Name == ((ListBoxItem)this.listBoxGroups.SelectedItem).Content.ToString());
            var selectedPage   = _pagescontrol._acceptablePages.FirstOrDefault(x => x.Url == ((ListBoxItem)this.listBoxPagesForGroup.SelectedItem).Content.ToString());

            using (ClientServiceClient client = new ClientServiceClient())
            {
                client.DeleteAcceptablePageForGroup(selectedPage, selectedgroups);
            }
            this.listBoxPagesForGroup.Items.Remove(this.listBoxPagesForGroup.SelectedItem);
        }