async private Task parameterSet(string turi)
		{
			textBlockTargetFeed.Text = turi.ToString();
			try
			{
				SyndicationClient client = new SyndicationClient();
				Uri feedUri = new Uri(turi);
				feed = await client.RetrieveFeedAsync(feedUri);
				FeedLsvModel feedData = new FeedLsvModel();

				foreach (SyndicationItem item in feed.Items)
				{
					FeedItem feedItem = new FeedItem();
					feedItem.Title = item.Title.Text;
					feedItem.PubDate = item.PublishedDate.DateTime;
					feedItem.Author = item.Authors[0].Name;
					// Handle the differences between RSS and Atom feeds.
					if (feed.SourceFormat == SyndicationFormat.Atom10)
					{
						feedItem.Content = item.Content.Text;
						feedItem.Link = new Uri(turi + item.Id);
					}
					else if (feed.SourceFormat == SyndicationFormat.Rss20)
					{
						feedItem.Content = item.Summary.Text;
						feedItem.Link = item.Links[0].Uri;
					}
					feedData.Items.Add(feedItem);
				}
				ItemListView.DataContext = feedData.Items;
				ItemListView.SelectedIndex = 0;
			}
			catch (Exception ex)
			{
				textBlockTargetFeed.Text = "ネットワークに問題が発生しました。RSSフィードが受信できません。 e:" + ex.ToString();
			}
		}
		async private void ItemListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
		{
			if ((ItemListView.DataContext == null) ||
				(ItemListView.SelectedIndex < 0))
			{
				/* 
					* feed変更時は前回のアイテムを吐き出す為に,
					* return,2回目で読む,
					* ItemListView.DataContext と
					* ItemListView.SelectedIndex 両方の判定が必要 
				*/
				return;
			}
			FeedItem f = new FeedItem();
			var item = feed.Items[ItemListView.SelectedIndex];
			string link = string.Empty;
			if (item.Links.Count > 0)
			{
				link = item.Links[0].Uri.AbsoluteUri;
				currentViewUri = link;
			}
			string content = "(no content)";
			if (item.Content != null)
			{
				content = item.Content.Text;
			}
			else if (item.Summary != null)
			{
				content = item.Summary.Text;
			}
			/*
				* webView.Navigate(f.Link) では,
				* 上手くLink HTMLを拾えない
				* webView.NavigateToString(content) を使う
				*/
			//webView.Navigate(f.Link);
			webView.NavigateToString("<html><body>" + content + "</body></html>");
			webView.Visibility = Visibility.Visible;
			await Task.Delay(0);
		}