Defines a callback method that will be invoked when a context item changes.
Assembly: System.Activities.Presentation (in System.Activities.Presentation.dll)
This callback provides a mechanism for interested parties in both the host and the workflow designer to subscribe to updates to a ContextItem published to the editing context of the workflow designer.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.