You are developing a Windows Store app that uses a webcam. You need to be notified if new
webcams are connected to the system.
Which class should you use?

A.
DevicelnformationWatcher

B.
EnclosureLocation

C.
DeviceWatcher

D.
DevicelnformationCollection

Explanation:
http://msdn.microsoft.com/enus/library/windows/apps/windows.devices.enumeration.devicewatcher.aspx