API to get Visualization data

Rhino Developer
1

Which Rhino API can be used to get Visualization data (Tessellation data) from 3DM file, created from Rhino?
Visualization data should include all PolySurfaces in Rhino file)

2

Does this help?

https://github.com/dalefugier/SampleCsCommands/blob/master/SampleCsMeshBrep.cs