Share Email Facebook Twitter LinkedIn DefinitionGroups.Size Property The number of definition groups in the collection.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34) Syntax C# public int Size { get; }Property ValueInt32 See AlsoReferenceDefinitionGroups ClassAutodesk.Revit.DB Namespace