Share Email Facebook Twitter LinkedIn FamilyParameter.IsDeterminedByFormula Property Indicates if the parameter is determined by formula.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0) Syntax C# public bool IsDeterminedByFormula { get; }Property ValueBoolean RemarksThe parameter is read only if it is determined by formula. See AlsoReferenceFamilyParameter ClassAutodesk.Revit.DB Namespace