This property indicates whether this parameter can be modified by UI user or not. True if the parameter will be modifiable by the user in the user interface, false if the parameter will display as read-only. The default is true.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0)
Since: 2015