[CONNECT Update 16] GetStringFromMstnResource

I notice that the .NET Session class has member GetStringFromMstnResource.  It looks like that function gets a string from a message list stored in a .rsc file, which is what we've done for MDL and C++ apps for donkey's years. 

In a .NET AddIn, how is that .rsc file connected to the code?  With the MicroStationAPI, we build an app that merges resources (messages, dialogs etc) into the app.ma file.  But a .NET AddIn doesn't have a permanent .ma file.  How does a .rsc file work with a .NET AddIn build?