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/Services/IImageService.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.ServiceModel;
+using System.Text;
+using System.IO;
+using System.ServiceModel.Web;
+
+namespace WindowsPhone.Recipes.Push.Server.Services
+{
+    /// <summary>
+    /// Provides custom tile images.
+    /// </summary>
+    [ServiceContract]
+    public interface IImageService
+    {
+        /// <summary>
+        /// Get custom tile image.
+        /// </summary>
+        /// <param name="parameter">The tile image request parameter.</param>
+        /// <returns>Custom tile image stream.</returns>
+        [OperationContract, WebGet]
+        Stream GetTileImage(string parameter);
+    }
+}