private void DoSubscribe(SiteUser siteUser)
{
foreach (LetterInfo available in siteAvailableSubscriptions)
{
ListItem item = clNewsletters.Items.FindByValue(available.LetterInfoGuid.ToString());
if ((item != null) && (item.Selected))
{
DoSubscribe(available, siteUser);
}
}
List <LetterSubscriber> memberSubscriptions = subscriptions.GetListByUser(siteUser.SiteGuid, siteUser.UserGuid);
NewsletterHelper.RemoveDuplicates(memberSubscriptions);
}