Build a rhino import Plug-in in C#

I am trying to make a rhino import-plugin using C# in visual studio. Where can I find sample code/examples?
I would like to import multiple rhino file templates in a single rhino file.

Thanks in advance!

In the Rhino Developer category.
I just moved your message there.

This is helpful too:

Thanks for the resource. In the past I have made a rhino plug-in with default settings. I am looking for solutions to make a rhino-plugin that can be specifically used to import files.