[IfcIndexedPolygonalFace.ToFaceSet property ToFaceSet public IfcCollection<IfcPolygonalFaceSet> ToFaceSet { get; } 也可以看看 class IfcCollection<T> class IfcPolygonalFaceSet class IfcIndexedPolygonalFace 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]