Usage

View view = uiApplication.ActiveUIDocument.ActiveView;
Document document = uiApplication.ActiveUIDocument.Document;

document.Export("path/to/sample.bim",
    new BimExportOptions() {View = view, WithLinks = true, WithElementInfo = true, WithDocumentInfo = true})

Sample

Known Issues

It's doesn't work 😂, because I don't know how to fetch mesh indices correctly. But I think this project will be good start point to research.