ASP.NETプログラムからフォルダを削除することによるセッションの失効問題の解決方法の共有

 
   
  
void Application_Start(object sender, EventArgs e)
    {
        //             
        System.Reflection.PropertyInfo p = typeof(System.Web.HttpRuntime).GetProperty("FileChangesMonitor", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
        object o = p.GetValue(null, null);
        System.Reflection.FieldInfo f = o.GetType().GetField("_dirMonSubdirs", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.IgnoreCase);
        object monitor = f.GetValue(o);
        System.Reflection.MethodInfo m = monitor.GetType().GetMethod("StopMonitoring", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
        m.Invoke(monitor, new object[] { });
    }