[IfcRelSpaceBoundary2ndLevel.CorrespondingBoundary property 对应边界 public IfcRelSpaceBoundary2ndLevel CorrespondingBoundary { get; set; } 也可以看看 class IfcRelSpaceBoundary2ndLevel 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]