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Service Bus Queues are part of a broader
Windows Azure messaging infrastructure that supports queuing as
well as publish/subscribe, web service remoting, and integration
patterns.
Service Bus Queues support a brokered messaging
communication model. When using queues, components of a
distributed application do not communicate directly with each
other, they instead exchange messages via a queue, which acts as an
intermediary. A message producer (sender) hands off a message to
the queue and then continues its processing. Asynchronously, a
message consumer (receiver) pulls the message from the queue and
processes it. The producer does not have to wait for a reply from
the consumer in order to continue to process and send further
messages.

Service Bus Queues are accessed through the
following APIs:
BizTalk Server 2010 allows us to develop
solutions that use any of the above API's. In this article we will
look at the easiest and most commonly used pattern for connecting
to external systems, the BizTalk Messaging and WCF-Adapter
model.
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