To specify the method of extrusion. The available options are Use Coordinate System, Face Normal and Face Normal (Reversed).
Declaration Syntax
public enum ExtrudeBy
Table 1383: Members
| 
                 Member  | 
                 FaceNormal  | 
                 FaceNormal.  | 
| 
                 Member  | 
                 FaceNormalReversed  | 
                 FaceNormalReversed.  | 
| 
                 Member  | 
                 UseCoordinateSystem  | 
                 UseCoordinateSystem.  |