Share Email Facebook Twitter LinkedIn FaceSecondDerivatives.UUDerivative Property The second derivative with respect to U. Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0) Syntax C# public XYZ UUDerivative { get; }Property ValueXYZ See AlsoReferenceFaceSecondDerivatives ClassAutodesk.Revit.DB Namespace