This .NET class wraps the AcDbPolyFaceMesh ObjectARX class. 

The PolyFaceMesh class represents the PolyFaceMesh special polyline entity type within AutoCAD.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.Entity
        Autodesk.AutoCAD.DatabaseServices.PolyFaceMesh

Public Class PolyFaceMesh
Inherits Entity
Inherits IEnumerable

public class PolyFaceMesh : Entity, IEnumerable;

The PolyFaceMesh uses a list of vertices made up of coordinate point vertices and FaceRecord vertices. The coordinate point vertices come first in the list, followed by all of the FaceRecord vertices. 

The controlling application must explicitly delete the subentities of any complex entity that is not database resident. Otherwise, a small memory leak will result. 

Do not derive from this class. Attempting to do so will cause your application to halt AutoCAD.