hMailServer.Administrator.ucDistributionList.buttonSelectRecipients_Click C# (CSharp) Method

        private void buttonSelectRecipients_Click(object sender, EventArgs e)
        {
            formSelectUsers selectUsers = new formSelectUsers(true, 0);

            if (selectUsers.ShowDialog() == DialogResult.OK)
            {
                hMailServer.DistributionListRecipients recipients = representedObject.Recipients;

                List<string> listUsers = selectUsers.GetSelectedTexts();

                foreach (string address in listUsers)
                {
                    hMailServer.DistributionListRecipient recipient = recipients.Add();
                    recipient.RecipientAddress = address;
                    recipient.Save();

                    Marshal.ReleaseComObject(recipient);
                }

                Marshal.ReleaseComObject(recipients);

                ListRecipients();
            }
        }