我可以创建一个文件夹,我可以重命名文件,但我不能上传和下载文件到ftp。显示的异常是System.Net.WebException:远程服务器返回错误:(500)语法错误,命令无法识别。日志文件:System.Net Information: 0 : [6112] FtpControlStream#7746814 - Resposta recebida [500 PORT/EPRT (Active Mode/Extended Active Mode) is not supported. Use PASV/EPSV instead of this] System.Net I