[IfcStructuralReaction.Causes property 原因 public IfcCollection<IfcStructuralAction> Causes { get; } 也可以看看 class IfcCollection<T> class IfcStructuralAction class IfcStructuralReaction 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]