Microsoft Windows Workflow Foundation 4.0 Cookbook

Using a customized extension

WF4 also allows us to define our own WF4 extensions. In this task, we will create a simple extension and use this extension in a workflow.

How to do it...

1. Create a Workflow Console Application:

   Add a new Workflow Console Application to the Chapter06 solution and name it UsingCustomizedExtension.

2. Create a customized extension:

   Add a new code file to the project and name the file SimpleExtension.cs. Fill the file with the following code:

   using System.Activities.Hosting; using System.Collections.Generic; using System; namespace UsingCustomizedExtension { public class SimpleExtension : IWorkflowInstanceExtension { private WorkflowInstanceProxy instance; public IEnumerable<object> GetAdditionalExtensions() { return null; } public ...