void Monitor()
{
// don't advertise and monitor at the same time
StopAdvertise();
if (isMonitoring)
{
Log("Already monitoring.");
return;
}
if (locationManager == null)
{
locationManager = new CLLocationManager();
}
locationManager.DidStartMonitoring += DidStartMonitoringForRegion;
locationManager.DidEnter += DidEnterRegion;
locationManager.DidExit += DidExitRegion;
locationManager.DidRangeBeacons += DidRangeBeacons;
locationManager.StartMonitoring(beaconRegion);
locationManager.StartRangingBeaconsInRegion(beaconRegion);
Log("Monitoring.");
isMonitoring = true;
}