eliodamaggio 

Use this for Microsoft Azure Service Bus Queues, Topics, Relay and Notification Hubs backend operations. It adds Microsoft.ServiceBus.dll along with related configuration files to your project. This library... More information

Use this with Windows Azure Service Bus and Notification Hubs client registration (for Windows Store and Windows Phone 8 apps). It adds Microsoft.WindowsAzure.Messaging.Managed.dll to your project. This... More information

Use this with Windows Azure Service Bus (for Windows Store). It adds Microsoft.WindowsAzure.Messaging.winmd to your project. This package is for developing Windows Store applications