AmazonSqs.Status.MainWindow.gridQueues_SelectedCellsChanged C# (CSharp) Method

        private void gridQueues_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)
        {
            if (this.gridQueues.SelectedItem is QueueDescription) {
                QueueDescription qd = (QueueDescription)this.gridQueues.SelectedItem;

                this.gridMessages.ItemsSource = this.queueAdmin.ListTop10Messages(qd.Url);

                this.buttonDeleteQueue.IsEnabled = true;
                return;
            }

            this.buttonDeleteQueue.IsEnabled = false;
        }