CallControlEventActivity.Unsubscribe Method

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) _
)
'Usage
Dim parentContext As ActivityExecutionContext
Dim parentEventHandler As IActivityEventListener(Of QueueEventArgs)

Me.Unsubscribe(parentContext, parentEventHandler)

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

Parameters

• parentContext
  Type: System.Workflow.ComponentModel.ActivityExecutionContext

• parentEventHandler
  Type: System.Workflow.ComponentModel.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