Creates a nested aggregate and adds it to the aggregate.

Namespace: Autodesk.Revit.DB.IFC
Assembly: RevitAPIIFC (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since: 2013

Syntax

C#
`public IFCAggregate AddAggregate()`

Visual Basic
`Public Function AddAggregate As IFCAggregate`

Visual C++
`public: IFCAggregate^ AddAggregate()`

The nested aggregate.

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions InvalidOperationException	The aggregate is not valid.