Is tags <Polygon>, <Polyline> supported in XAML?

For now, we only support the optimized format for paths (streamgeometry). The alternatives are less efficient and are only useful if you want to modify the internal paths at runtime. If you are using Blend, it is very easy to convert a Path to a stream geometry. Just select the path and copy the Data field, create a new Path and paste the Data into it.

Ок, Thanks!