Questions

Hi there,

1. Please, try out this:

    public class ZoomPanModifierEx: ZoomPanModifier
    {
        public event EventHandler DragCompleted;

        public override void OnModifierMouseUp(ModifierMouseArgs modifierMouseArgs)
        {
            base.OnModifierMouseUp(modifierMouseArgs);

            OnDragComplete();
        }

        private void OnDragComplete()
        {
            var handler = DragCompleted;

            if(handler != null)
            {
                handler(this, EventArgs.Empty);
            }
        }
    }

If you use SciStockChart, you need to replace the old modifier with this new:

            var group = ((ModifierGroup) stockChart.ChartModifier);

//Find and remove old ZoomPan
            var panModifier = group["ZoomPanModifier"];
            group.ChildModifiers.Remove(panModifier);

//Create new modifier and subscribe it
            var zoomPan = new ZoomPanModifierEx();
            zoomPan.DragCompleted += OnDragCompleted;

//Add to ModifierGroup
            group.ChildModifiers.Add(zoomPan);

1. You should use Update(x, y) or FindIndex(oldValue)/RemoveAt(index)/Insert(index, newValue)

Hope this is helpful!

Best regards,
Yuriy