void Page_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if(_dragged != null)
{
//Set correct Z-index
Rect r = new Rect(Canvas.GetLeft(_dragged), Canvas.GetTop(_dragged), _dragged.Width, _dragged.Height);
var t = from uc in _objects
where uc != _dragged && (
uc.ContainsPoint(r.TopLeft()) || uc.ContainsPoint(r.TopRight()) ||
uc.ContainsPoint(r.BottomLeft()) || uc.ContainsPoint(r.BottomRight()))
orderby Canvas.GetZIndex(uc) descending
select uc;
int z;
if(t.Count() > 0)
z = Canvas.GetZIndex(t.FirstOrDefault()) + 1;
else
z = 0;
Canvas.SetZIndex(_dragged, z);
}
_dragged = null;
}