protected virtual void FireEvent(GestureRecordEventArgs e)
 {
     if (GestureRecordEventHandler != null)
     {
         GestureRecordEventHandler(this, e);
     }
 }
        private void GestureRecordEventHandler(object sender, GestureRecordEventArgs e)
        {
            this.Dispatcher.Invoke((Action)(() => { // update from any thread
                repetitionsLbl.Content = e.StampleNr.ToString();
            }));

            if (e.StampleNr == 5)
            {
                gestureIndex.SaveNewGesture();
                gestureRecorder.GestureRecordEventHandler -= GestureRecordEventHandler;
            }
        }