PolygonCollider change by script

Can anyone tell me, how can i change polygonCollider by script? Like i did it with mesh.
"Mesh mesh = mesh;
mesh.vertices...
mesh.uv..."

Here i can't see some like this, i tryed to use Physic Matherialm but i understod, that it is only using for change physic dynamic. Really haven't ideas, how to change collider, if i wrote mesh in script by myself.

 

http://docs.unity3d.com/ScriptReference/PolygonCollider2D.html In particular the SetPath function.

--Eric

 

very big thanks to you, my hero xD