Revit 2019.1 APIArc..::..YDirection Property Arc Class See Also Returns the Y direction.Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 19.0.0.0 (19.1.0.0)SyntaxC#public XYZ YDirection { get; }Visual BasicPublic ReadOnly Property YDirection As XYZ GetVisual C++public: property XYZ^ YDirection { XYZ^ get (); }See AlsoArc ClassAutodesk.Revit.DB Namespace