Identifies if the element has been pinned to prevent changes. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
Remarks
 An element which is pinned may not be moved, and warnings will be issued when an attempt is made to delete it. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions InvalidOperationException | When setting this property: Element cannot be pinned or unpinned. |