问如何使用c#更改文件夹中每个文件的只读文件属性？？

EN

foreach (string fileName in System.IO.Directory.GetFiles(path))
{
    System.IO.FileInfo fileInfo = new System.IO.FileInfo(fileName);

    fileInfo.Attributes |= System.IO.FileAttributes.ReadOnly;
    // or
    fileInfo.IsReadOnly = true;
}

public void Recurse(DirectoryInfo directory)
{
    foreach (FileInfo fi in directory.GetFiles())
    {
        fi.IsReadOnly = false; // or true
    }

    foreach (DirectoryInfo subdir in directory.GetDirectories())
    {
        Recurse(subdir);
    }
}