protected override void OnChildRemoved(ChildChangedEventArgs e) { base.OnChildRemoved(e); OnChildMembershipChanged(e); }
protected virtual void OnChildAdded(ChildChangedEventArgs e) { this.ChildAdded?.Invoke(this, e); }
protected override void OnChildRemoved(ChildChangedEventArgs e) { base.OnChildRemoved(e); HandleChildChanged(this, e); }