This .NET class wraps the AcDbFace ObjectARX class. 

It represents the 3dface entity within AutoCAD.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.Entity
        Autodesk.AutoCAD.DatabaseServices.Face

Public Class Face
Inherits Entity

public class Face : Entity;

DBObject, Entity, FaceRecord