Windows Workflow Foundation (WF) allows developers to create declarative application logic for quicker development. Custom activities are the key to reuse and simplified application development. In this course, you will learn how to build simple and advanced activities including custom control flow activities. Coverage includes building asynchronous activities as well as how to create template activities that allows consumers to define some of the activity logic. NOTE: this course contains the same introductory activity module found in the WF4 introduction course. If you have watched the module there already, you can skip to the second module.