Can I use WindowsAzure NuGet package for Windows Server development?

Which Nuget package should I be using when developing a service that uses the Service Bus for Windows Server 1.1? 

I've been using the 'ServiceBus.v1_1' package up to now, but on a whim tried using the 'WindowsAzure.ServiceBus' package and that appears to be working for a basic program:

var namespaceManager = NamespaceManager.Create();
var messagingFactory = MessagingFactory.Create();

var sub = messagingFactory.CreateQueueClient("queue");
sub.RegisterSessionHandler(typeof(MySessionHandler));

The reason I want to use this is as above - I want to use the RegisterSessionHandler feature to manage my sessions for me, but this functionality appears to be missing in the Service Bus 1.1 package.

If I avoid using the newer, unsupported Azure features, should I be safe using this package?