[IfcExtendedMaterialProperties.ExtendedProperties property ExtendedProperties public IfcCollection<IfcProperty> ExtendedProperties { get; set; } 也可以看看 class IfcCollection<T> class IfcProperty class IfcExtendedMaterialProperties 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
