Share Email Facebook Twitter LinkedIn FamilyParameter.Formula Property The formula.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0) Syntax C# public string Formula { get; }Property ValueString RemarksReturns null if there is no formula governing this parameter. See AlsoReferenceFamilyParameter ClassAutodesk.Revit.DB Namespace