Use style trigger to set property of a nested object

Question

I have a small polygon written on the large canvas. I want to highlight a polygon when mouse is moving over the canvas. The code is like this:

Answer 1

You cannot use Setters like that, if you use this kind of notation the engine will look for an attached property, or if no Style.TargetType was set for a property on the type before the dot.

The easiest thing to do is probably applying a style to the polygon itself and using a DataTrigger which binds to the Canvas so you can trigger on its properties.