CallDisconnectedEventActivity.IEventActivity.Unsubscribe Method

Cancels the subscription of an System.Workflow.ComponentModel.Activity to a Microsoft Unified Communications Managed API event.

Namespace:  Microsoft.Rtc.Workflow.Activities
Assembly:  Microsoft.Rtc.Workflow (in Microsoft.Rtc.Workflow.dll)

Syntax

'Declaration
Private Sub Unsubscribe ( _
    parentContext As ActivityExecutionContext, _
    parentEventHandler As IActivityEventListener(Of QueueEventArgs) _
) Implements IEventActivity.Unsubscribe
'Usage
Dim instance As CallDisconnectedEventActivity
Dim parentContext As ActivityExecutionContext
Dim parentEventHandler As IActivityEventListener(Of QueueEventArgs)

CType(instance, IEventActivity).Unsubscribe(parentContext, _
    parentEventHandler)

void IEventActivity.Unsubscribe(
    ActivityExecutionContext parentContext,
    IActivityEventListener<QueueEventArgs> parentEventHandler
)

Parameters

• parentContext
  Type: System.Workflow.ComponentModel.ActivityExecutionContext
  The System.Workflow.ComponentModel.ActivityExecutionContext that represents the execution environment of the System.Workflow.ComponentModel.Activity.

• parentEventHandler
  Type: System.Workflow.ComponentModel.IActivityEventListener<QueueEventArgs>
  The System.EventHandler for the parent event.

Implements

IEventActivity.Unsubscribe(ActivityExecutionContext, IActivityEventListener<QueueEventArgs>)

Exceptions

Exception	Condition
ArgumentNullException	Thrown if the argument is null.
InvalidOperationException	Thrown if retrieving CommunicationsWorkflowRuntimeService fails.
InvalidOperationException	Thrown if CallProvider or CallProvider.Call is null.

See Also

Reference

CallDisconnectedEventActivity Class

CallDisconnectedEventActivity Members

Microsoft.Rtc.Workflow.Activities Namespace