Read the original post by Jerry Nixon at DZone
Windows 8 apps are like a stack of cards. Only the top card is active – the rest (apps) have their threads suspended. Windows 8 snap view actually allows for two active apps. That’s pretty cool.
Here’s what you need to know:
Background tasks
Some developers need to run code when apps are not running. For this, there is the background task. These are periodic and have constrained CPU and Network usage.
There are two types of background tasks: standard and lock screen tasks. There can be only 7 lock screen tasks, and the key difference is the constraint thresholds.