What .NET Mime Parsing libraries are available?

using(Imap imap = new Imap())
{
    imap.Connect("imapServer");
    imap.Login("user", "password");

    imap.SelectInbox();
    List<long> uids = imap.SearchFlag(Flag.Unseen);

    foreach (long uid in uids)
    {
        string eml = imap.GetMessageByUID(uid);
        IMail message = new MailBuilder()
            .CreateFromEml(eml);

        Console.WriteLine(message.Subject);
    }
    imap.Close(true);
}