AVCam.CameraViewController.AddObservers C# (CSharp) Method

		void AddObservers ()
		{
			runningObserver = session.AddObserver ("running", NSKeyValueObservingOptions.New, OnSessionRunningChanged);

			subjectSubscriber = NSNotificationCenter.DefaultCenter.AddObserver (AVCaptureDevice.SubjectAreaDidChangeNotification, SubjectAreaDidChange, videoDeviceInput.Device);
			runtimeErrorObserver = NSNotificationCenter.DefaultCenter.AddObserver (AVCaptureSession.RuntimeErrorNotification, SessionRuntimeError, session);

			// A session can only run when the app is full screen. It will be interrupted in a multi-app layout, introduced in iOS 9.
			// Add observers to handle these session interruptions
			// and show a preview is paused message. See the documentation of AVCaptureSession.WasInterruptedNotification for other
			// interruption reasons.
			interuptionObserver = NSNotificationCenter.DefaultCenter.AddObserver (AVCaptureSession.WasInterruptedNotification, SessionWasInterrupted, session);
			interuptionEndedObserver = NSNotificationCenter.DefaultCenter.AddObserver (AVCaptureSession.InterruptionEndedNotification, SessionInterruptionEnded, session);
		}