Microsoft Windows Workflow Foundation 4.0 Cookbook

Using ExistsInCollection<T> activity

In this task, we will use the ExistsInCollection<T> activity to check whether or not a specified item exists in the collection object.

Getting ready

We need to make sure we have finished the task of Printing collection items for us to be able to use CollectionPrinterActivity in this task.

How to do it...

1. Create a Console Workflow Application:

   Create a new Workflow Console Application and name it UsingExistsInCollectionActivity.

2. Create a workflow:

   We need to perform the following actions to create a workflow:

   1. Open Workflow1.xaml, which is the workflow created by default. Click the Imports button and type in System.Collections.ObjectModel to import the System.Collections.ObjectModel namespace to this workflow.