The grade of wood used in a wood-based asset. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2013 
Syntax
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Remarks
 Applies to wood-based structural assets. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | When setting this property: A non-optional argument was null | 
| Autodesk.Revit.ExceptionsInapplicableDataException | When setting this property: the material type must be wood to set this property. |