Sets the ElementId of the cut face background pattern override. The fill pattern must be a drafting pattern. A value of InvalidElementId means no override is set. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2019 
Syntax
| C# | 
|---|
|  | 
| Visual Basic | 
|---|
|  | 
| Visual C++ | 
|---|
|  | 
Parameters
- fillPatternId
- Type: Autodesk.Revit.DBElementId
 Value of the cut face background fill pattern override.
Return Value
Reference to the changed object.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null |