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Cancels the subscription of the CallControlEventActivity to an event.

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

Syntax

'Declaration
Protected Overridable Sub Unsubscribe ( _
    parentContext As ActivityExecutionContext, _
    parentEventHandler As IActivityEventListener(Of QueueEventArgs) _
)

protected virtual void Unsubscribe(
    ActivityExecutionContext parentContext,
    IActivityEventListener<QueueEventArgs> parentEventHandler
)

protected:
virtual void Unsubscribe(
    ActivityExecutionContext^ parentContext, 
    IActivityEventListener<QueueEventArgs^>^ parentEventHandler
)

function unsubscribe(parentContext, parentEventHandler);

Parameters

  • parentContext
    Type: ActivityExecutionContext
  • parentEventHandler
    Type: IActivityEventListener<(Of <(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

CallControlEventActivity Class

Microsoft.Rtc.Workflow.Activities Namespace