private void Unload()
{
if (_element != null)
{
this.PointerWheelChanged -= Border_PointerWheelChanged;
this.PointerPressed -= Border_PointerPressed;
this.PointerReleased -= Border_PointerReleased;
this.PointerMoved -= Border_PointerMoved;
_element.RenderTransform = null;
_element = null;
}
}