The Id of the element assocated with this material in the model.
Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 23.0.0.0 (23.1.0.0)
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.