private void StartCameraService()
{
camera = new PhotoCamera(CameraType.FrontFacing);
// Event is fired when the PhotoCamera object has been initialized.
camera.Initialized += cam_Initialized;
// Event is fired when the capture sequence is complete and an image is available.
camera.CaptureImageAvailable += cam_CaptureImageAvailable;
camera.CaptureImageAvailable += cam_CaptureImageCompleted;
// Event is fired when the capture sequence is complete and a thumbnail image is available.
camera.CaptureThumbnailAvailable += cam_CaptureThumbnailAvailable;
// The event is fired when auto-focus is complete.
camera.AutoFocusCompleted += cam_AutoFocusCompleted;
cameraInitialized = false;
viewFinderBrush.SetSource(camera);
}