DWGExportOptions

                List<ElementId> viewIds = new List<ElementId>();
                viewIds.Add(viewSheet.Id);
                DWGExportOptions options = new DWGExportOptions();
                options.Colors = ExportColorMode.IndexColors;
                options.ExportOfSolids = SolidGeometry.Polymesh;
                options.FileVersion = ACADVersion.R2013;
                options.HatchPatternsFileName = @"C:\Program Files\Autodesk\Revit 2016\ACADInterop\acdb.pat";
                options.HideScopeBox = true;
                options.HideUnreferenceViewTags = true;
                options.HideReferencePlane = true;
                options.LayerMapping = "AIA";
                options.LineScaling = LineScaling.PaperSpace;
                options.LinetypesFileName = @"C:\Program Files\Autodesk\Revit 2016\ACADInterop\acdb.lin";
                options.MergedViews = false;
                options.PropOverrides = PropOverrideMode.ByEntity;
                options.TextTreatment = TextTreatment.Exact;
                document.Export(filePath, fileName, viewIds, options);

Source: forums.autodesk.com

DWGExportOptions

IList<string> setupNames = BaseExportOptions.GetPredefinedSetupNames(document);

Source: forums.autodesk.com

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