Public NotInheritable Class SubscriptionSendToConnectionsCache
You do not need to declare an instance of a static class in order to access its members.
External connections are represented by SPOfficialFileHost. The SubscriptionSendToConnectionsCache is implemented as an asynchronous cache with an expiration duration of three hours.
Any public static
in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.