The default-constructed Entity is invalid.
Namespace: Autodesk.Revit.DB.ExtensibleStorageAssembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax
Remarks
Invalid entities may be used as token values. E.g., setting an invalid subentity
is equivalent to deleting the stored one.
See Also