Where is WorkItemChangedEvent in TFS 2013 Update 2?

This is more for my own reference. If you use iSubscriber in your applications you may have noticed they’ve stopped working in Update 2 of TFS 2013 because they can’t find WorkItemChangedEvent.

This is now located in Microsoft.TeamFoundation.WorkItemTracking.Server which can be found here.

C:\Program Files\Microsoft Team Foundation Server 12.0\Application Tier\Web Services\bin\Microsoft.TeamFoundation.WorkItemTracking.Server.dll