如何在C#中从Folder.Zip创建Subfolder.Zip文件

string sourceFolderPath = @"C:\path\to\folder";
string zipFilePath = @"C:\path\to\Folder.Zip";
ZipFile.CreateFromDirectory(sourceFolderPath, zipFilePath);

string folderZipFilePath = @"C:\path\to\Folder.Zip";
string subfolderZipFilePath = @"C:\path\to\Subfolder.Zip";
string subfolderName = "subfolder";

using (ZipArchive folderZipArchive = ZipFile.OpenRead(folderZipFilePath))
{
    using (ZipArchive subfolderZipArchive = ZipFile.Open(subfolderZipFilePath, ZipArchiveMode.Create))
    {
        foreach (ZipArchiveEntry entry in folderZipArchive.Entries)
        {
            if (entry.FullName.StartsWith(subfolderName + "/"))
            {
                // 创建新的ZipArchiveEntry，并将其内容从Folder.Zip复制到Subfolder.Zip
                ZipArchiveEntry newEntry = subfolderZipArchive.CreateEntry(entry.FullName);
                using (Stream entryStream = entry.Open())
                using (Stream newEntryStream = newEntry.Open())
                {
                    entryStream.CopyTo(newEntryStream);
                }
            }
        }
    }
}