public CreateDialogView() { InitializeComponent(); AnimationContext = LayoutRoot; _createChatButton.Click += (sender, args) => ViewModel.Create(); Loaded += (sender, args) => { if (!_once) { _once = true; _searchBox = SelectedUsers.FindChildOfType <TextBox>(); if (_searchBox != null) { var keyPressEvents = Observable.FromEventPattern <TextChangedEventHandler, TextChangedEventArgs>( keh => { _searchBox.TextChanged += keh; }, keh => { _searchBox.TextChanged -= keh; }); _keyPressSubscription = keyPressEvents .Throttle(TimeSpan.FromSeconds(0.1)) .ObserveOnDispatcher() .Subscribe(e => { SearchItems.Visibility = string.IsNullOrEmpty(_searchBox.Text.Trim()) ? Visibility.Collapsed : Visibility.Visible; ViewModel.Search(_searchBox.Text); }); } BuildLocalizedAppBar(); } ViewModel.ScrollTo += OnViewModelScrollTo; }; Unloaded += (sender, args) => { ViewModel.ScrollTo -= OnViewModelScrollTo; }; }