Does anyone have code in C# to add a new data frame (map) to an MXD? I have an MXD created in ArcMap 10.1 that has an existing data frame. I need to programmatically add a new data frame and populate it with several layers from a personal geodatabase. I'm using VS2010 with .Net 3.5. I have created a MultiItem that reads the names of folders that contain the PGDB files. After selecting a name from the list (which is populating correctly) it triggers OnSelChange. In that routine I need to create a data frame named based on the folder name selected from the MultiItem list. The name comes in just fine, but I'm stuck creating the new dataframe. I tried using IMaps.Create() but it doesn't add anything to the count of maps. I have tried then using IMaps.Add() but VS reports that Add is not defined for IMaps contrary to being described in the ArcObjects reference.
The only procedure I have found is the one written in VBA using ArcObjects 10. It seems rather convoluted given there are supposed to be functional methods for IMaps to do exactly what I need. Any help would be greatly appreciated.