public override void ItemAdded(SPItemEventProperties properties)
     {
        AlertManager manager = new AlertManager(properties.List, properties.Web);

        manager.UpdateAlerts();

        base.ItemAdded(properties);
    }

private void CreateUserAlerts(SPUser user)
    {
        SPAlert newAlert = user.Alerts.Add();
        newAlert.Title = "AlertTitle" ;
        newAlert.AlertType = SPAlertType.List;
        newAlert.List = currentList;
        newAlert.DeliveryChannels = SPAlertDeliveryChannels.Email;
        newAlert.EventType = SPEventType.All;
        newAlert.AlertFrequency = SPAlertFrequency.Immediate;

        string userFilter = "userLoginNoTriggerALert";

        newAlert.Filter = "<Query><Neq><FieldRef Name="Author/New"  /><Value type="Text">" + userFilter + "</Value></Neq></Query>";

        newAlert.Update(true);

        SPAlert alert2 = user.Alerts[newAlert.ID];
        alert2.Update();
    }