/// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>.
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session. The state will be null the first time a page is visited.</param>
        private async void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            if (e.PageState != null)
            {
                if (e.PageState.ContainsKey("MapRotation") && e.PageState["MapRotation"]!=null)
                {
                    mapRotation = (MapRotation) e.PageState["MapRotation"];
                }
                else
                {
                    mapRotation = await SplatoonInk.GetMapRotation();
                }
            }
            else
            {
                mapRotation = await SplatoonInk.GetMapRotation();
            }

            if(mapRotation!=null)
            listView.ItemsSource= mapRotation.schedule;
        }
 /// <summary>
 /// Populates the page with content passed during navigation.  Any saved state is also
 /// provided when recreating a page from a prior session.
 /// </summary>
 /// <param name="sender">
 /// The source of the event; typically <see cref="NavigationHelper"/>
 /// </param>
 /// <param name="e">Event data that provides both the navigation parameter passed to
 /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
 /// a dictionary of state preserved by this page during an earlier
 /// session.  The state will be null the first time a page is visited.</param>
 private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
 {
 }