We have found an regression error.
in version 18.9 the attached visio have more shapes in the exported PDF
They are missing from 18.10 and onward.
using the following code:
var SVGso = new SVGSaveOptions(); SVGso.SaveFormat = SaveFileFormat.SVG; d.Save(svgoutname, SVGso);
Visio with 3 version (18.9 - 18.11) of the output named accordingly
missing_shapes.zip (1.2 MB)