As per KCS Creating a durable subscription with the AMQ .NET Client when creating a durable subscription the comments in the source code and the AMQP 1.0 specification imply that you can fully recover the durable subscription by passing a null in as the Source to the ReceiverLink constructor.

However at the moment if you do that the AMQ 7.0.3 broker will immediately send a detach and sever the connection. It is required to pass a fully constructed Source instance to the ReceiverLink constructor to recover the durable subscription.

Usage of durable subscriptions is not documented in the client documentation at the moment and for the C++ client there is ENTMQCL-587 to deliver the required functionality in the AMQ Clients release v1.2.1 to allow this to work.