Once you have created your extension (A set of Actions, Entities, and Structures available in Service Studio but implemented in foreign technologies), you may define the actions exported by the extension. These actions allow you to use its functionality in a different application or technology.
To add an action to your extension, execute one of the following operations:
Add the action manually to the extension. How?
Import the action from a .NET assembly, through the Import Actions from .Net Assembly wizard. This wizard is only available in a .NET or (Both) application server.
Add an Action | Import Actions from .Net Assembly | Action Editor | About an Extension