Load map with popups（代码好像有问题！！！）

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.WebMap;

namespace ArcGISSilverlightSDK
{
    public partial class WebMapNotesPopups : UserControl
    {
        public WebMapNotesPopups()
        {
            InitializeComponent();

            Document webMap = new Document();
            webMap.GetMapCompleted += webMap_GetMapCompleted;

            webMap.GetMapAsync("2ccf901c5b414e5c98a346edb75e3c13");
        }

        void webMap_GetMapCompleted(object sender, GetMapCompletedEventArgs e)
        {
            if (e.Error == null)
            {//发现下面代码并没有起到什么作用？？？？？
                foreach (Layer layer in e.Map.Layers)
26                 {
27                     if (layer is GraphicsLayer)
28                     {
29                         GraphicsLayer glayer = layer as GraphicsLayer;
30                         // Modification of the default map tip style
31                         Border border = glayer.MapTip as Border;
32                         if (border != null)
33                         {
34                             border.Background = new SolidColorBrush(Color.FromArgb(200, 102, 150, 255));
35                             border.CornerRadius = new CornerRadius(4);
36                         }
37                     }
38                 }
                LayoutRoot.Children.Add(e.Map);
            }
        }
    }
}