public ViewModelMain(ref CaptureElement cameraControlView)
        {
            CameraControl = cameraControlView;
            TakePhotoManager = new MediaCapture();

            var task = CameraTest_task(); 
            var task2 = PictureLoading_task();

            CameraViewCommand = new Pomocnicze.RelayCommand(pars => CameraViewButton());
            ImageListCommand = new Pomocnicze.RelayCommand(pars => ShowImagesList_async());
            ShareCommand = new Pomocnicze.RelayCommand(pars => ShareButton());
            PictureTapCommand = new Pomocnicze.RelayCommand(pars => SetNextPicture());

            Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested +=BackRequested;


            DataTransferManager ShareManager = DataTransferManager.GetForCurrentView();
            ShareManager.DataRequested += new TypedEventHandler<DataTransferManager, DataRequestedEventArgs>(this.ShareImageHandler);

            CameraButtonName = "Camera View";
            ImageListButtonName = "Images List";
            ShareButtonName = "Share";

            ShareButtonIsEnable = true;
        }
        public ViewModelMain(ref CaptureElement ce)
        {
            camera_source = ce;
            takephotoManager = new MediaCapture();

            var task = CameraTest(); 

            CameraViewCommand = new Pomocnicze.RelayCommand(pars => CameraViewButton());
            ImageListCommand = new Pomocnicze.RelayCommand(pars => ImageListButton());
            ShareCommand = new Pomocnicze.RelayCommand(pars => ShareButton());
            TheTapCommand = new Pomocnicze.RelayCommand(pars => NastepnyObrazek());

            var wczytywanie_obr = wczytywanie_obrazka();
            Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested +=App_BackRequested;

            DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
            dataTransferManager.DataRequested += new TypedEventHandler<DataTransferManager, DataRequestedEventArgs>(this.ShareImageHandler);

            CameraButtonName = "Camera View";
            ImageListButtonName = "Images List";
            ShareButtonName = "Share";

            ShareButtonIsEnable = true;
        }