public MainPage()
        
        {
           
            InitializeComponent();
            
            _navigationHelper = new NavigationHelper(this);

            _sensor = KinectSensor.GetDefault();

            if (_sensor != null)
            {
                _sensor.Open();

                _reader = _sensor.OpenMultiSourceFrameReader(FrameSourceTypes.Color | FrameSourceTypes.Depth | FrameSourceTypes.Infrared | FrameSourceTypes.Body);
                _reader.MultiSourceFrameArrived += Reader_MultiSourceFrameArrived;

                _gestureController = new GestureController();
                _gestureController.GestureRecognized += GestureController_GestureRecognized;
            }
            // Initialize the gesture detection objects for our gestures
            this.gestureDetectorList = new List<GestureDetector>();

            // Create a gesture detector for each body (6 bodies => 6 detectors)
            int maxBodies = this._sensor.BodyFrameSource.BodyCount;
            for (int i = 0; i < maxBodies; ++i)
            {
                GestureResultView result =
                     new GestureResultView(i, false, false, 0.0f);
                GestureDetector detector =
                    new GestureDetector(this._sensor, result);
                result.PropertyChanged += GestureResult_PropertyChanged;
                this.gestureDetectorList.Add(detector);
            }
        }
        /// <summary>
        /// Initializes a new instance of the GestureDetector class along with the gesture frame source and reader
        /// </summary>
        /// <param name="kinectSensor">Active sensor to initialize the VisualGestureBuilderFrameSource object with</param>
        /// <param name="gestureResultView">GestureResultView object to store gesture results of a single body to</param>
        public GestureDetector(KinectSensor kinectSensor, GestureResultView gestureResultView)
        {
            if (kinectSensor == null)
            {
                throw new ArgumentNullException("kinectSensor");
            }

            if (gestureResultView == null)
            {
                throw new ArgumentNullException("gestureResultView");
            }

            this.GestureResultView = gestureResultView;

            // create the vgb source. The associated body tracking ID will be set when a valid body frame arrives from the sensor.
            this.vgbFrameSource = new VisualGestureBuilderFrameSource(kinectSensor, 0);
            this.vgbFrameSource.TrackingIdLost += this.Source_TrackingIdLost;

            // open the reader for the vgb frames
            this.vgbFrameReader = this.vgbFrameSource.OpenReader();
            if (this.vgbFrameReader != null)
            {
                this.vgbFrameReader.IsPaused = true;
                this.vgbFrameReader.FrameArrived += this.Reader_GestureFrameArrived;
            }

            // load the gesture from the gesture database
            using (VisualGestureBuilderDatabase database = new VisualGestureBuilderDatabase(this.gestureDatabase))
            {
                // we could load all available gestures in the database with a call to vgbFrameSource.AddGestures(database.AvailableGestures),
                // but for this program, we only want to track one discrete gesture from the database, so we'll load it by name
                //foreach (Gesture gesture in database.AvailableGestures)
                //{
                //    if (gesture.Name.Equals(this.seatedGestureName))
                //    {
                //        this.vgbFrameSource.AddGesture(gesture);
                //    }
                //}

                // we could load all available gestures in the database with a call to vgbFrameSource.AddGestures(database.AvailableGestures),
                // but for this program, we only want to track one discrete gesture from the database, so we'll load it by name
                foreach (Gesture gesture in database.AvailableGestures)
                {
                    if (gesture.Name.Equals(this.handsAboveHeadGestureName))
                    {
                        this.vgbFrameSource.AddGesture(gesture);
                    }
                }
            }
        }