สอบถามเกี่ยวกับ Mail Client การอ่านเมลใน Inbox ครับ C#

private void listView_inbox_SelectedIndexChanged(object sender, EventArgs e)
        {
            using (Imap imap = new Imap())
            {
                imap.Connect("imap.gmail.com", 993, true);
                imap.Login(Form1.email.Text, Form1.password.Text);

                imap.SelectInbox();
                List<long> uidList = imap.Search(Flag.All);
                List<string> mail = new List<string>();
                    foreach (long uid in uidList)
                    {
                        IMail email = new MailBuilder()
                        .CreateFromEml(imap.GetMessageByUID(uid));
                        richTB_bodymail.Text = email.From + "\n" + email.Subject + "\n\n" + email.TextDataString;
                        //break;
                    }
            }
        }