P

AreaBasedLoadBoundaryLineData.BottomLevelId

Description:
The bottom level id of the area based load boundary line.

Remarks:
The bottom level's elevation cannot be higher than the top level.

public ElementId BottomLevelId { get; set; }

Public Property BottomLevelId As ElementId
Get
Set

public:
property ElementId^ BottomLevelId {
	ElementId^ get ();
	void set (ElementId^ value);
}

Autodesk.Revit.Exceptions.ArgumentException

When setting this property: The ElementId levelId cannot be used as the bottom level. The ElementId levelId is not a Level or it's elevation is higher than the top level's elevation.
Autodesk.Revit.Exceptions.ArgumentNullException

When setting this property: A non-optional argument was null