protected override void OnStop()
{
if (_listener == null)
{
throw new InvalidOperationException("Can't stop if not started");
}
_listener.Stop();
_listener = null;
}
protected override void OnStart()
{
if (_listener != null)
{
throw new InvalidOperationException("Already started");
}
_listener = new GcEventListener();
_listener.GcEvents += OnGc;
WriteLine(Header);
}