How to make a multi-colour dash in WPF (for a polygon) -


i able make dashed polygon in wpf using strokedashedarray property, i.e., 

polygon maskingpolygon = new polygon() maskingpolygon.stroke = brushes.white; maskingpolygon.strokedasharray = new doublecollection() {2,2};

however, can't seem make dash pattern rotates through few different colours. want create dash alternates between black , white. hope functionality this:

polygon maskingpolygon = new polygon() maskingpolygon.strokedasharray = new dictionary<int,brush>(); maskingpolygon.strokedasharray.add(2, white); maskingpolygon.strokedasharray.add(2, black);

i need use alternating black , white dashes because polygon needs visible if overlaid on arbitrary photo.

i have illustrated effect desire below using red instead of white visibility.

multi-colour dash illustration

the hacky way inherit polygon class , create 2 polygons same set of points, 1 dashes overlaid 1 without dashes. that's clumsy.


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