private void BodyManager_EngagedBodyUpdated(object sender, Events.Bodies.EngagedBodyUpdatedEventArgs e) { if (_BodyManager.IsBodyEngaged(e.Body.TrackingId)) { if (!_TrackedIds.Contains(e.Body.TrackingId)) { _TrackedIds.Add(e.Body.TrackingId); StartFaceTracking(e.Body.TrackingId); } } }