MessageReceiver Class

Although you can use the QueueClient class to send and receive messages without creating a MessageReceiver object, you can also use MessageSender and MessageReceiver to create a sender and receiver on an entity. However, note that you can only use a MessageReceiver to receive messages from a queue or subscription; you cannot receive messages or listen for messages from a topic. Similarly, you can only use a MessageSender to send messages to a queue or topic; you cannot send messages to a subscription. Note that the default message receive mode is PeekLock, which ensures reliable message receiving.

When you create a MessageReceiver for subscriptions, the entityPath parameter is of the form topicPath/subscriptions/subscriptionName.

The following example receives a message from the queue created in the MessageSender example:

Uri serviceUri = ServiceBusEnvironment.CreateServiceUri("sb", ServiceNamespace, string.Empty); 

MessagingFactory factory = MessagingFactory.Create(serviceUri, credentials); 

MessageReceiver myMessageReceiver = factory.CreateMessageReceiver(queueName);

BrokeredMessage message;
while ((message = myMessageReceiver.Receive(new TimeSpan(hours: 0, minutes: 1, seconds: 5))) != null)
{
    Console.WriteLine(
    string.Format(
    "Message received: Id = {0}, Body = {1}", message.MessageId, message.GetBody<string>()));
    message.Complete();
}

Any public static (Shared in Visual Basic) members of this type are thread safe. Instance members are also guaranteed to be thread safe.

Reference