ArcGISWindowsPhoneSDK.RoutingBarriers.routeTask_Failed C# (CSharp) Method

        private void routeTask_Failed(object sender, TaskFailedEventArgs e)
        {
            string errorMessage = "Routing error: ";
            errorMessage += e.Error.Message;
            foreach (string detail in (e.Error as ServiceException).Details)
                errorMessage += "," + detail;

            MessageBox.Show(errorMessage);

            if ((_stops.Count) > 10)
            {
                stopsLayer.Graphics.RemoveAt(stopsLayer.Graphics.Count - 1);
                _stops.RemoveAt(_stops.Count - 1);
            }
        }