diff --git a/GamestatsBase/GamestatsSessionManager.cs b/GamestatsBase/GamestatsSessionManager.cs
index 3a4101e..4217161 100644
--- a/GamestatsBase/GamestatsSessionManager.cs
+++ b/GamestatsBase/GamestatsSessionManager.cs
@@ -5,8 +5,10 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Web;
+using System.Web.Caching;
 
 namespace GamestatsBase
 {
@@ -18,7 +20,6 @@ namespace GamestatsBase
         public GamestatsSessionManager(HttpApplication application)
         {
             m_application = application;
-            m_application.EndRequest += Application_EndRequest;
         }
 
         private HttpApplication m_application;
@@ -42,12 +43,6 @@ namespace GamestatsBase
             }
         }
 
-        private void Application_EndRequest(object sender, EventArgs e)
-        {
-            // todo: run this less often. Should be a background task like GC
-            PruneSessions();
-        }
-
         public void Add(GamestatsSession session)
         {
             Sessions.Add(session.Hash, session);
diff --git a/Sample/Global.asax.cs b/Sample/Global.asax.cs
index f7c156e..c51bba9 100644
--- a/Sample/Global.asax.cs
+++ b/Sample/Global.asax.cs
@@ -8,6 +8,7 @@ using System.Linq;
 using System.Web;
 using System.Web.Security;
 using System.Web.SessionState;
+using GamestatsBase;
 
 namespace Sample
 {
@@ -28,6 +29,15 @@ namespace Sample
             }
         }
 
+        void Application_EndRequest(object sender, EventArgs e)
+        {
+            // todo: find a way to make session expiry happen entirely in the
+            // GamestatsBase library.
+            // Currently, I run into a problem binding the EndRequest event:
+            // http://stackoverflow.com/questions/2781346/why-can-event-handlers-only-be-bound-to-httpapplication-events-during-ihttpmodul
+            GamestatsSessionManager.FromContext(Context).PruneSessions();
+        }
+
         public static String RewriteUrl(String url, out String pathInfo, out String query)
         {
             int q = url.IndexOf('?');