[ORD 10.09 C#] Obtain DgnModel Geographic Coordinate System (EPSG code)


I'm looking to get/set the Geographic Coordinate System from an OpenRoads/OpenRail dgn through the c# api as a part of a keyin command.


I've found in the microstation SDK forum a post such as this that looks helpful.

DgnModel activeModel = Session.Instance.GetActiveDgnModel();
DgnGCS cs = DgnGCS.FromModel(activeModel, true);

However, if I reference the Bentley.GeoCoord2.dll distributed with OpenRoads/OpenRail Connect Edition, the class DgnGCS isn't found from my searching.

Can someone please advise if this is possible or an alternative technique?