private void CopyToClipboard() { if (_listBox.SelectedItems.Count > 0) { var selectedItemsAsRTFText = new StringBuilder(); foreach (LogEventArgs logEvent in _listBox.SelectedItems) { selectedItemsAsRTFText.Append(FormatALogEventMessage(logEvent, _messageFormat)); } var worker = new ClipboardHelper(DataFormats.Text, selectedItemsAsRTFText.ToString()); worker.Go(); } }