Normal of the planar face.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0)
Syntax
Remarks
This property is the "face normal" vector, and thus should return a vector consistently pointing out of
the solid that this face is a boundary for (if it is a part of a solid).