How to add Network Connection to the TetheringManager Adapters List

How to add Network Connection to the TetheringManager Adapters List if you have two Network Connections on your computer.

Every time I check TetheringManager_Server.Adapters.Count.ToString it displays one 1 Network Connection.

I want to use TetheringManager_Server.Adapters.Add() to add the Network Connection but I do not know how to access the second Network Connection on the computer.

Thank you