[SOLVED] Farseer physics CreatePolygon remove any vertices problem

I was trying to add some polygons.
Then, I found a issue.
Please see this pic.

White lined polygon is truly pos and size polygons.
But practically, it appeared in another place and any vertices was removed.

An issue point I found is in PloygonShape.cs line 100.
It’s “_vertices = GiftWrap.GetConvexHull(_vertices);” and this method remove vertices.

So, how to resolve this problem?

Sorrrry, i missed to setting vertices…