async void ExecuteRefreshCommand()
        {
            UserDialogs.Instance.ShowLoading("Loading...");
            DogImage = await DogApiHelper.GetRandomImageAsync();

            UserDialogs.Instance.HideLoading();
        }
        public override async void Initialize(INavigationParameters parameters)
        {
            UserDialogs.Instance.ShowLoading("Loading...");
            DogImage = await DogApiHelper.GetRandomImageAsync();

            UserDialogs.Instance.HideLoading();
        }