Creates a subscribe request body and puts the workItem in queue to invoke Subscribe. Namespace: Microsoft.Rtc.Signaling
Assembly: Microsoft.Rtc.Collaboration (in microsoft.rtc.collaboration.dll)



Exception type Condition

Thrown when the Subscribe/BeginSubscribe operation to this SipSubscription had already been called.


Thrown when the endpoint is terminating.


Thrown if the event package is "vnd-microsoft-roaming-self" and sipendpoint already have a subscription for this event.


Because multiple subscriptions for the event "vnd-microsoft-roaming-self" are not allowed from same endpoint, establishing another subscription session for this event causes InvalidOperationException.

Thread Safety

All public static (Shared in Visual Basic) members of this type are thread-safe. Instance members are not guaranteed to be thread-safe.


Development Platforms

Windows XP Professional with Service Pack 2 (SP2), Windows Server 2003, Windows Vista Ultimate Edition, Windows Vista Business Edition, Windows Vista Enterprise Edition

Target Platforms

See Also