I'm using the following code to export the sheets to dwg:
public void ExportToDWG(Document doc,ViewSheet view, string viewName, string output_path) {
DWGExportOptions options = new DWGExportOptions()
options.Colors = ExportColorMode.IndexColors
options.ExportOfSolids = SolidGeometry.Polymesh
options.FileVersion = ACADVersion.R2013
options.HatchPatternsFileName = @"C:\Program Files\Autodesk\Revit 2017\ACADInterop\acdbiso.pat"
options.HideScopeBox = true
options.HideUnreferenceViewTags = true
options.HideReferencePlane = true
options.LayerMapping = "AIA"
options.LineScaling = LineScaling.PaperSpace
options.LinetypesFileName = @"C:\Program Files\Autodesk\Revit 2017\ACADInterop\acdbiso.lin"
options.PropOverrides = PropOverrideMode.ByEntity
options.TextTreatment = TextTreatment.Exact
options.MergedViews = true
ICollection<ElementId> views_collection = new List<ElementId>();
views_collection.Add(view.Id);
doc.Export(output_path, viewName, views_collection, options)
}
But when exporting the sheets, everything except Title Blocks gets exported: