OutOfMemoryException unhandled

"Windows Phone Emulator-WVGA 512 MB"和我的设备出现以下异常。当使用"Windows Phone Emulator-WVGA"时，我不会遇到这个问题。

这是我的xaml

    <phone:Panorama  Name="pano" >

    </phone:Panorama>

这是后面的代码

   protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        if (e.NavigationMode != NavigationMode.Back)
        {
            type = NavigationContext.QueryString["type"];
            ReadFromXml(type);
        }
    }
    private void ReadFromXml(string type)
    {
        XDocument xml=XDocument.Load(@"data/image_saba7.xml");

        var query = from c in xml.Root.Descendants("post")
                    select  c.Element("image").Value;
        foreach (var name in query)
        {

                createPanoramItem("", name);
        }
    }

    private void createPanoramItem(string tit, string imgurl)
    {
        BitmapImage image = new BitmapImage(
            new Uri(imgurl, UriKind.Relative)
            );

        Grid g = new Grid();
        Image im = new Image
        {
            Source = image,
            VerticalAlignment = System.Windows.VerticalAlignment.Center,
            Margin = new Thickness(10, 290,-10, 80),
        };
        img = imgurl;
        im.Tap += im_Tap;
        TextBlock t = new TextBlock
        {
            TextWrapping = TextWrapping.Wrap,
            Margin = new Thickness(10, 296, 10, 300),
            HorizontalAlignment = System.Windows.HorizontalAlignment.Center,
            TextAlignment = TextAlignment.Right,
            FontSize = 25,
            FontWeight = System.Windows.FontWeights.SemiBold,
            Foreground = new SolidColorBrush(new Color()
            {
                A = 255 /*Opacity*/,
                R = 132 /*Red*/,
                G = 91 /*Green*/,
                B = 54 /*Blue*/
            }),
            Text = tit
        };

        g.Children.Add(t);
        g.Children.Add(im);
        PanoramaItem panoramaCtrlItem = new PanoramaItem();
        panoramaCtrlItem.Content = g;
        // panoramaCtrlItem.Header = title;
        pano.Items.Add(panoramaCtrlItem);
    }