[IfcConstructionMaterialResource.Suppliers property 供应商 public IfcCollection<IfcActorSelect> Suppliers { get; set; } 也可以看看 class IfcCollection<T> class IfcActorSelect class IfcConstructionMaterialResource 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]