C# System.Net.FtpClient FTP上传代码

/// <summary>
        /// FTP上传文件
        /// </summary>
        /// <param name="strServer">服务器地址</param>
        /// <param name="strUser">用户名</param>
        /// <param name="strPassword">密码</param>
        /// <param name="Savepath">服务器用于保存的文件夹路径，不是服务器根路径,例如： "/UploadDocumentsSave/"</param>
        /// <param name="localpath">本地路径</param>
        /// <param name="filetype">文件类型，例如: ".rte"</param>
        public void FTPUpload(string strServer, string strUser, string strPassword, string Savepath, string localpath, string filetype)
        {
                 FtpClient ftp = new FtpClient();
                 ftp.Host = strServer;
                 ftp.Credentials = new NetworkCredential(strUser, strPassword);
                 ftp.Connect();

                 string[] files = Directory.GetFiles(localpath, "*" + filetype);
                 if(files.Length!=0)
                 {
                     foreach (string file in files)
                     {
                        using (var fileStream = File.OpenRead(file))
                        using (var ftpStream = ftp.OpenWrite(Savepath+Path.GetFileName(file)))
                        {
                            var buffer = new byte[8 * 1024];
                            int count;
                            while ((count = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                            {
                                ftpStream.Write(buffer, 0, count);
                            }
                        }
                    }
                      MessageBox.Show("OK");
                }            
        }