.NET C# 使用S22.Imap.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;
                        }
                    }

               }