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ContextItemManager.Subscribe(Of TContextItemType) Method (SubscribeContextCallback(Of TContextItemType))

Adds an event callback that is invoked when a context item of the specified item type changes.

Namespace:  System.Activities.Presentation
Assembly:  System.Activities.Presentation (in System.Activities.Presentation.dll)

Public Sub Subscribe(Of TContextItemType As ContextItem) ( _
	callback As SubscribeContextCallback(Of TContextItemType) _

Type Parameters


The type of item you want to subscribe to.


Type: System.Activities.Presentation.SubscribeContextCallback(Of TContextItemType)
A SubscribeContextCallback(Of TContextItemType) that is invoked when contextItemType changes.


contextItemType or callback is Nothing.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.