blog post - Background Agents

MemoryCheck.cs

if (((double)DeviceStatus.ApplicationCurrentMemoryUsage / (double)DeviceStatus.ApplicationMemoryUsageLimit) * 100d > 97d) {
	// We are using too much memory, try clean a few things up
	if (_Ctx != null)
		_Ctx.Dispose();
	_Ctx = new gReadieModelContext(gReadieModelContext.ConnectionString);
	GC.Collect();
	if (((double)DeviceStatus.ApplicationCurrentMemoryUsage / (double)DeviceStatus.ApplicationMemoryUsageLimit) * 100d > 97d) {
		// We couldn't recover enough memory, so we are really running out, lets be nice and bail
		NotifyComplete();
		return;
	}
}

ScheduledAgent.cs

public class ScheduledAgent : ScheduledTaskAgent
{
	protected override void OnInvoke(ScheduledTask task) {
		if (task is PeriodicTask) {
			// Do quick processing
		} else {
			// Do long processing
		}
		NotifyComplete();  // or Abort();
	}
}

WMAppManifest.xml

<Tasks>
	<DefaultTask Name="_default" NavigationPage="Home.xaml" />
	<ExtendedTask Name="BackgroundTask">
		<BackgroundServiceAgent Specifier="ScheduledTaskAgent" Name="gReadie.BackgroundAgent" Source="gReadie.BackgroundAgent" Type="gReadie.BackgroundAgent.ScheduledAgent" />
	</ExtendedTask>
</Tasks>