public void SaveSent(Sent sent)
        {
            // if it's a new sent mail, just attach it to the DataContext
            if (sent.Id == 0)
                sentsTable.InsertOnSubmit(sent);
            else if (sentsTable.GetOriginalEntityState(sent) == null)
            {
                // We're updating an existing sent mail, but it's not attached to this DataContext
                // so attach it and detect changes
                sentsTable.Attach(sent);
                sentsTable.Context.Refresh(RefreshMode.KeepCurrentValues, sent);
            }

            sentsTable.Context.SubmitChanges();
        }
 public void DeleteSent(Sent sent)
 {
     sentsTable.DeleteOnSubmit(sent);
     sentsTable.Context.SubmitChanges();
 }