Share Email Facebook Twitter LinkedIn NestedFamilyTypeReference.CategoryId Property Category Id of the referenced family Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0) Syntax C# public ElementId CategoryId { get; }Property ValueElementId See AlsoReferenceNestedFamilyTypeReference ClassAutodesk.Revit.DB Namespace