Use this for Microsoft Azure Notification Hubs back end operations.
It adds Microsoft.Azure.NotificationHubs.dll to your project. Notification Hubs support sending push notifications to Windows, Windows Phone, iOS, Android, Amazon, and Baidu.
For more information on Notification Hub,...
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 package is for developing Windows Store and Windows Phone 8 applications with C# (managed)