private UIElement AddRect(Point Position)
{
var ui = new Rectangle() { Stroke = Brushes.Black, Fill = Brushes.Beige, Height = 130, Width = 130 };
Canvas.SetLeft(ui, Position.X);
canvastest.Children.Add(ui);
Canvas.SetTop(ui, Position.Y);
ManipulationProcessor manip = new ManipulationProcessor() { ManipulationSuported = System.Windows.Input.Manipulations.Manipulations2D.Translate };
manip.ManipulationUpdate += manip_ManipulationUpdate;
ui.AddGesture(manip);
DragAndDrop.SetAllowDrop(ui, true);
var target = new LinkCreatorTarget();
target.CanDropCallback = OnCanLinkDrop;
target.LinkDropCallback = OnLinkDrop;
Interaction.GetBehaviors(ui).Add(target);
Interaction.GetBehaviors(ui).Add(new TemporaryLinkCreator());
return ui;
}