CallControlEventActivity.IEventActivity.Unsubscribe Method

Called to get the CallControlEventActivity to unsubscribe for its 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 CallControlEventActivity
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

• parentEventHandler
  Type: System.Workflow.ComponentModel.IActivityEventListener<QueueEventArgs>

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

CallControlEventActivity Class

CallControlEventActivity Members

Microsoft.Rtc.Workflow.Activities Namespace