如何在c#中正确使用sftp上传文件夹和文件？

Install-Package SSH.NET

using (var client = new SftpClient("hostname", "username", "password"))
{
    client.Connect();
    client.UploadFile("localFilePath", "remoteFilePath");
    client.Disconnect();
}

using (var client = new SftpClient("hostname", "username", "password"))
{
    client.Connect();
    var localDirectory = new DirectoryInfo("localDirectoryPath");
    foreach (var file in localDirectory.GetFiles("*.*", SearchOption.AllDirectories))
    {
        var remoteFilePath = file.FullName.Replace(localDirectory.FullName, "remoteDirectoryPath");
        client.UploadFile(file.FullName, remoteFilePath);
    }
    client.Disconnect();
}