Share Email Facebook Twitter LinkedIn MEPSystem.IsEmpty Property Indicates if the system is empty or not. Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0) Syntax C# public bool IsEmpty { get; }Property ValueBoolean Remarks returns true if the system doesn't contain any components See AlsoReferenceMEPSystem ClassAutodesk.Revit.DB Namespace