I wish to have possibility create fill closed region of the ClientGraphics.

How Used:

This new ClientGraphics primitive:
The FillRegionGraphics must have properties:
color - property color
hatch - property for selection Inventor's hatch
fill -property for fill region (as boolean ?)
ClosedPath - collection closed regions (analog ProfilePath)

In the object GraphicsNode add one more method:
AddFillRegionGraphics(GraphicObjectCollection() as Object)
when GraphicObjectCollection() is collection of GraphicsPrimitive (Line, Curve etc.)
Of course, the GraphicObjectCollection must be closed region

Feature Affinity:
this feature very similar to objects: SkethFillRegion and Profiles