I would like to implement a function like Boss command.
I have no ideal but know it belong Extrusion.
Referece:
CreateExtrusion:
http://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_BrepFace_CreateExtrusion.htm
Boss command:
http://docs.mcneel.com/rhino/5/help/en-us/commands/boss.htm