Inheritance Hierarchy:
System.Object
Autodesk.Revit.DB.Element
Autodesk.Revit.DB.HostObject
Autodesk.Revit.DB.CeilingAndFloor
Autodesk.Revit.DB.Ceiling
System.Object
Autodesk.Revit.DB.Element
Autodesk.Revit.DB.HostObject
Autodesk.Revit.DB.CeilingAndFloor
Autodesk.Revit.DB.Ceiling