Inheritance Hierarchy:
System.Object
Autodesk.Revit.DB.APIObject
Autodesk.Revit.DB.GeometryObject
Autodesk.Revit.DB.Curve
Autodesk.Revit.DB.Ellipse
System.Object
Autodesk.Revit.DB.APIObject
Autodesk.Revit.DB.GeometryObject
Autodesk.Revit.DB.Curve
Autodesk.Revit.DB.Ellipse