public PerformanceView()
        {
            InitializeComponent();

            _navigationHelper = new NavigationHelper(this);
            IterationsTb.Text = "100000";
        }

        public BeveragesDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            BeveragesModel = new BeveragesViewModel();
        }

 /// <summary>
 /// Konstruktor widoku.
 /// </summary>
 public CommentsPage()
 {
     this.InitializeComponent();
     this.navigationHelper = new NavigationHelper(this);
     this.navigationHelper.LoadState += navigationHelper_LoadState;
     this.navigationHelper.SaveState += navigationHelper_SaveState;
 }

        public InstaPhotosDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            InstaPhotosModel = new InstaPhotosViewModel();
        }

 public FeedPage() {
   InitializeComponent();
   _navigationHelper = new NavigationHelper(this);
   _navigationHelper.LoadState += navigationHelper_LoadState;
   _navigationHelper.SaveState += navigationHelper_SaveState;
   _categories = new HashSet<CardCategory>();
 }

        public ReadFB2Page()
        {
            this.InitializeComponent();
            this.navigationHelper = new NavigationHelper(this);

            BackGroundGrid.Background = new SolidColorBrush(ProgramState.CurrentState.TextStyle.SimpleTextStyle.BackgroundColor);

            if (NavigationCache.Book != null)
            {
                text.Clear();

                text.AddRange(NavigationCache.Book.Text);

                                  
                currentBookInHistory = (Book)ProgramState.CurrentState.History.Files.Find(x => x.Type == FileType.Book && ((Book)x.DocumentFile).Title == NavigationCache.Book.Title).DocumentFile;

                if (NavigationCache.Book.NavigationHistory == null || NavigationCache.Book.NavigationHistory.Count == 0)
                {
                    NavigationCache.Book.NavigationHistory = new List<TextPosition>();//new Stack<TextPosition>();
                    navigationHistory.Push(TextPosition.StartPosition);
                }
                else
                { 
                    navigationHistory = new Stack<TextPosition>(NavigationCache.Book.NavigationHistory); 
                }
            }
            bookTitle.Text = NavigationCache.Book.Title;
            
        }

        public Main1Detail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            Main1Model = new Main1ViewModel();
        }

        public DessertsDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            DessertsModel = new DessertsViewModel();
        }

        public FBHeyIsItOnDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

        public HeyIsItOnBlogList()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

 public DetailsView()
 {
     this.InitializeComponent();
     this.navigationHelper = new NavigationHelper(this);
     this.navigationHelper.LoadState += navigationHelper_LoadState;
     this.navigationHelper.SaveState += navigationHelper_SaveState;
 }

        public InstagramDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            InstagramModel = new InstagramViewModel();
        }

        public AthleteTipsList()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

        public MicBergsmaDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

        public GoProVODList()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

 public AddEmployee()
 {
     this.InitializeComponent();
     this.navigationHelper = new NavigationHelper(this);
     this.navigationHelper.LoadState += navigationHelper_LoadState;
     this.navigationHelper.SaveState += navigationHelper_SaveState;
 }

        public SpecialOffersDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SpecialOffersModel = new SpecialOffersViewModel();
        }

        public SignUpView()
        {
            this.InitializeComponent();
            this.navigationHelper = new NavigationHelper(this);

          
        }

        public GoProFacebookDetail()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);

            SizeChanged += OnSizeChanged;
        }

        public GPAthleteTipsPage()
        {
            this.InitializeComponent();
            _navigationHelper = new NavigationHelper(this);
            GPAthleteTipsModel = new GPAthleteTipsViewModel();

            SizeChanged += OnSizeChanged;
        }