/// <summary>
/// Occurs when the link is clicked.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">A <see cref="RoutedEventArgs"/> that contains the event data.</param>
private void OnGoToPreviousDocCommentHyperlinkClick(object sender, RoutedEventArgs e)
{
reader.Offset = editor.ActiveView.Selection.EndOffset;
reader.GoToPreviousTokenWithKey("XmlCommentStartTag");
this.AppendMessageAndUpdateUI("Previous documentation comment", true);
}