Convert3DTo2D.cs

public static string Convert3DTo2D(Revit.Elements.Views.View view, List<Element> GridorLevel)
        {
            Document doc = DocumentManager.Instance.CurrentDBDocument;
            View v = view.InternalElement as View;
            TransactionManager.Instance.EnsureInTransaction(doc);
            List<DatumPlane> planes = GridorLevel.Select(x => x.InternalElement).Cast<DatumPlane>().ToList();
            foreach (DatumPlane datumPlane in planes)
            {
                datumPlane.SetDatumExtentType(DatumEnds.End0, v, DatumExtentType.ViewSpecific);
                datumPlane.SetDatumExtentType(DatumEnds.End1, v, DatumExtentType.ViewSpecific);
            }
            TransactionManager.Instance.TransactionTaskDone();
            TransactionManager.Instance.ForceCloseTransaction();
            return "Execute";
        }