push notification helper library

http://windowsteamblog.com/windows_phone/b/wpdev/archive/2011/01/14/windows-push-notification-server-side-helper-library.aspx
http://create.msdn.com/en-us/education/catalog/article/pnhelp-wp7

main/Libs/PushRecipe_WP7_SL/Source/WindowsPhone.Recipes.Push.Server/App.xaml.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Windows;
+using System.ComponentModel.Composition;
+using System.ComponentModel.Composition.Hosting;
+
+using WindowsPhone.Recipes.Push.Server.Services;
+using WindowsPhone.Recipes.Push.Server.ViewModels;
+
+namespace WindowsPhone.Recipes.Push.Server
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        public CompositionContainer Container { get; private set; }
+
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            // Initialize MEF to export parts from current assembly.
+            var catalog = new AssemblyCatalog(typeof(App).Assembly);
+            Container = new CompositionContainer(catalog);
+            Container.ComposeParts();
+
+            // Create and show the main window where MainViewModel is the default source for data-binding.
+            new MainWindow
+            {
+                DataContext = Container.GetExportedValue<MainViewModel>()
+
+            }.Show();
+
+            base.OnStartup(e);
+        }        
+    }
+}