Share Email Facebook Twitter LinkedIn GroupSet.IsEmpty Property Test to see if the set is empty.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0) Syntax C# public virtual bool IsEmpty { get; }Property ValueBoolean RemarksIf the set is empty then True will be returned, otherwise False. See AlsoReferenceGroupSet ClassAutodesk.Revit.DB Namespace