Whether or not the list of top-level categories is empty.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 23.0.0.0 (23.1.0.0)

Syntax

C#
public override bool IsEmpty { get; }
Visual Basic
Public Overrides ReadOnly Property IsEmpty As Boolean
	Get
Visual C++
public:
virtual property bool IsEmpty {
	bool get () override;
}

See Also