The id of the top-level element in the linked document that is referred to by this reference.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since: 2014
Syntax
Remarks
InvalidElementId will be returned for references that don't refer to an element in a linked RVT file.