AutoCAD Civil 3D :: Add Assign Pipe Network To Profile View Band In 2011

I'm trying to add assign a Pipe Network to a profile view Band in Civil 3D 2011. I was using COM to add profiles to bands because I couldn't figure out how to do it in .NET. But when it comes to pipe networks I don't see how you can do that with COM. How the .NET implementation is supposed to work? Here's the code I have that works for COM, except for the pipe networks. I essentially need to assign the correct pipe network to the band.
 
public static void AddProfileToBand(this ProfileView profileView, ObjectId profObjId, List<BandItemInfo> bandStyleInfosFromSet, ObjectId profileBandSetId){
using (Transaction tr = Application.DocumentManager.MdiActiveDocument.TransactionManager.StartTransaction())

[code]....