Share Email Facebook Twitter LinkedIn ScheduleFilter.IsNullValue Property Indicates if the filter has no specified value. Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34) Syntax C# public bool IsNullValue { get; }Property ValueBoolean See AlsoReferenceScheduleFilter ClassAutodesk.Revit.DB Namespace