Returns curve loops that define geometry of the area boundary conditions. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 
Syntax
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Return Value
The curve loop collection.Remarks
 Boundary conditions should be BoundaryConditionsType::Area type. Otherwise exception is thrown. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions InvalidObjectException | Thrown when BoundaryConditions is not a BoundaryConditionsType::Area type. |