说明：  运用DotNetBar样式编写的FTP上传下载文件，两种上传模板，包括Ftp的新建文件夹，读取大小，断点续传，等FtpWebRequest系列相关功能，内带注释，能直接运行，适合新手。。
(FTP upload and download files written in dotnetbar style, two upload templates, including the new folder of FTP, read size, breakpoint continuation, and other related functions of FTP webrequest series, with comments, can run directly, suitable for novices..)