The Id of the element assocated with this material in the model.
Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.0.0.377)
Since: 2014
Syntax
Remarks
It is possible that no specific material is applied to a face, in which case
the default material is used, and this property returns an InvalidElementId.