[IfcConditionCriterion.Criterion property 标准 public IfcConditionCriterionSelect Criterion { get; set; } 也可以看看 class IfcConditionCriterionSelect class IfcConditionCriterion 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]