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.Messasges/MessageSendPriority.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace WindowsPhone.Recipes.Push.Messasges
+{
+    /// <summary>
+    /// Represents the priorities of which the Push Notification Service sends the message.
+    /// </summary>
+    public enum MessageSendPriority
+    {
+        /// <value>The message should be delivered by the Push Notification Service immediately.</value>
+        High = 0,
+
+        /// <value>The message should be delivered by the Push Notification Service within 450 seconds.</value>
+        Normal = 1,
+
+        /// <value>The message should be delivered by the Push Notification Service within 900 seconds.</value>
+        Low = 2
+    }
+}