Benefits of Push Notification
The Microsoft Push Notification Service (MPNS) is designed to be resilient and to expose a persistent channel for sending notifications to Windows Phone devices.
Apart from some special cases, the Windows Phone platform does not allow multiple apps to be running at the same time.1 The main reason is that, in most cases, it is not efficient to have background apps consuming device resources, such as maintaining an open connection and sending data over the wire. Network activity results in high power consumption and decreased battery life.
1. Background tasks allow an app to run in the background periodically for short periods. For more information, see Chapter 32, “Conducting Background Activities with Scheduled ...
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