protected override async void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            SetContentView(Resource.Layout.RegisterItemActivity);
            var registerItems = await RestClient.GetRegisterItems();
            _registerItemManager = new RegisterItemManager(registerItems);
            _registerItemManager.MoveFirst();


           SetupSignalR();

            _registerItemPagerAdapter = new RegisterItemPagerAdapter(SupportFragmentManager, _registerItemManager);
            _viewPager = FindViewById<ViewPager>(Resource.Id.registerItemPager);
            _viewPager.Adapter = _registerItemPagerAdapter;
        }
        protected override async void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            SetContentView(Resource.Layout.RegisterItemActivity);
            var registerItems = await RestClient.GetRegisterItems();

            _registerItemManager = new RegisterItemManager(registerItems);
            _registerItemManager.MoveFirst();


            SetupSignalR();

            _registerItemPagerAdapter = new RegisterItemPagerAdapter(SupportFragmentManager, _registerItemManager);
            _viewPager         = FindViewById <ViewPager>(Resource.Id.registerItemPager);
            _viewPager.Adapter = _registerItemPagerAdapter;
        }