Sets the boundary and path curves of the sketched landing. 
   Namespace:   Autodesk.Revit.DB.Architecture  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0) 
  Since:  2017 
Syntax
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Parameters
- document
 -  Type:  Autodesk.Revit.DB Document  
The document that owns the landing. 
- boundaryCurveLoop
 -  Type:  Autodesk.Revit.DB CurveLoop  
The closed boundary curves of the landing. 
- pathCurveLoop
 -  Type:  Autodesk.Revit.DB CurveLoop  
The path curves of the landing, can be an empty CurveLoop. 
Remarks
 This should be run from within an open transaction. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The boundaryCurveLoop is not closed. -or- The input boundaryCurveLoop contains at least one curve which is not a bound Line or bound Arc and is not supported for this operation. -or- The input pathCurveLoop contains at least one curve which is not a bound Line or bound Arc and is not supported for this operation. -or- Failed to create curve element by the boundaryCurveLoop or pathCurveLoop. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was null |