Please provide a .Net version of the OpenRoadsDesignerAPI help document?
Looks like Bentley.GeometryNet.chm is not BentleyGeometryNEt.chm, right? Is BentleyGeometryNet.chm found in ORD CONNECT SDK doc folder might be the same as Bentley.GeometryNET.Structs.chm found in the MicroStationSDK documents folder. They have the same name spaces listed. It's a bit confusing for those of us just getting going in CONNECT.