How can I receive messages using ordered batched method in Win 8.1 (WinRT Store App)

I'm using WindowsAzure.Messaging.Managed in my Windows Store App, and I can receive only one message per second.

e.g.

Topic topic = new Topic(TopicName, connectionString);
Subscription sub = new Subscription(topic.Path, "Receiver", onnectionString);
sub.ReceiveAsync<Message>().ContinueWith(MessageReceived);

How can I receive ordered batched messages like in regular .NET 4.51 app using BrokeredMessage class.

Thanks