如何使用renci库在sftp中移动文件?

您需要首先使用将客户端连接到服务器

sftp.Connect();

Source

public static void MoveFiles(string source, string destination, LoginInfo loginInfo) {
    try {
        using (SftpClient sftp = new SftpClient(loginInfo.Uri, loginInfo.Port, loginInfo.User, loginInfo.Password)) {
            sftp.Connect();
            var files = sftp.ListDirectory(source)
            foreach (SftpFile file in files) {
                file.MoveTo(destination + file.Name);
            }
        }
    } catch(Exception ex) {
        //...handle
    }
}