Creates a transaction async result to refresh an existing subscription and puts the workitem in queue. Refresh is allowed only if the current subscription state is valid. Multiple simultaneous refreshes are allowed, but not recommended for the application.

Send an update message on existing subscription dialog, this is useful where server allows the chnage in the semantics of existing subscription dialog especially used for LS batch subscriptions.

Creates an subscribe request body and puts the workItem in queue to invoke Subscribe.

If a subscription exists, then terminate the subscription; else completed as no operation.

Ends the pending refresh operation.

Ends the pending Subscription Update operation.

Ends the pending asynchronous subscribe operation.

Ends the pending terminate operation.

Synchronous version of BeginRefresh and EndRefresh.

Synchronous version of BeginSubscribe and EndSubscribe.

Synchronous version of BeginTerminate and EndTerminate.

Returns the string representation for the SipSubscription object, which basically contains endpointId, event, and the current subscription state.

Gets the current signaling state of the subscription.

Gets the name of the event package, for which this subscription is created.

Gets true if current state is subscribed or refreshing.

Gets true or false. When IsQueryOnly is set to true, Expires 0 header would be automatically added on the underlying subscription. The default value is false.

Gets the endpoint of the subscriber who creates this subscription.

Gets the target to be used in the "To" header in the Subscribe request.

Gets the time span remaining to expire this subscription.