/// <summary>
 /// Raises the distance sended event.
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected virtual void OnDistanceSensed(object sender, DistanceSensedEventArgs e)
 {
     if (this.DistanceSensed != null)
     {
         this.DistanceSensed(sender, e);
     }
 }
        private void _eyes_DistanceSensed(object sender, DistanceSensedEventArgs e)
        {
            Debug.WriteLine("{0}ms (distance: {1})", e.Duration.TotalMilliseconds, e.Distance);

            var blinkPeriod = Math.Min(400, e.Duration.TotalMilliseconds * 150);
            _animation.Period = TimeSpan.FromMilliseconds(blinkPeriod);
        }