/// <summary>
/// Detach the event repeater from the document instance
/// </summary>
public void Detach()
{
// confirm preconditions
Debug.Assert(connectionPoint != null);
// detach and set internal references to null
connectionPoint.Unadvise(connectionPointCookie);
connectionPoint = null;
HtmlDocument = null;
_eventCounter.AssertAllEventsAreUnhooked();
}