Revit 2020.1 APIReference ClassMembers See Also A stable reference to a geometric object in a Revit model.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.1.1.1)SyntaxC#public class Reference : APIObjectVisual BasicPublic Class Reference _ Inherits APIObjectVisual C++public ref class Reference : public APIObjectInheritance HierarchySystem..::..Object Autodesk.Revit.DB..::..APIObject Autodesk.Revit.DB..::..ReferenceSee AlsoReference MembersAutodesk.Revit.DB Namespace