.NET C# 使用S22.I地图.dll接收邮件 并且指定收取的文件夹的未读邮件，并且更改未读准态

   string host = Conf.ConfigInfo.POP_Host;                int port = Conf.ConfigInfo.POP_Port;                string username =Conf.ConfigInfo.MailName;                string password = Conf.ConfigInfo.MailPassword;                using (S22.Imap.ImapClient client = new S22.Imap.ImapClient(host, port, username, password))                {                    var unseen = client.Search(SearchCondition.Unseen(), Conf.ConfigInfo.SelectFolder);                    if (unseen == null || unseen.Count() == 0)                    {                        Console.WriteLine(string.Format("==============>没有新邮件！"));                        return;                    }                    Console.WriteLine(string.Format("==============>开始检测"));                    foreach (uint uid in unseen)                    {                        var msg= client.GetMessage(uid,true,Conf.ConfigInfo.SelectFolder);                        try                        {                          Fetchcallback(msg, uid);                          client.SetMessageFlags(uid,Conf.ConfigInfo.SelectFolder,MessageFlag.Seen);                        }                        catch (Exception ex)                        {                            throw ex;                        }                    }               }