问C#：检索已安装屏幕保护程序的名称

EN

public class ScreenSaverInfo
{
    public string FileName { get; set; }
    public string Name { get; set; }
}

public IEnumerable<ScreenSaverInfo> GetScreenSavers()
{
    string currentSSPath = null;
    using (RegistryKey desktopKey = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop"))
    {
        if (desktopKey != null)
        {
            string screenSaverExe = desktopKey.GetValue("SCRNSAVE.EXE") as string;
            if (!string.IsNullOrEmpty(screenSaverExe))
            {
                currentSSPath = Path.GetDirectoryName(screenSaverExe);
            }
        }
    }

    HashSet<string> directories = new HashSet<string>();
    directories.Add(Environment.GetFolderPath(Environment.SpecialFolder.System));
    directories.Add(Environment.GetFolderPath(Environment.SpecialFolder.SystemX86));
    if (currentSSPath != null)
        directories.Add(currentSSPath);

    foreach (string dir in directories)
    {
        foreach (string file in Directory.EnumerateFiles(dir, "*.scr", SearchOption.TopDirectoryOnly))
        {
            yield return GetScreenSaverInfo(file);
        }
    }
}

public ScreenSaverInfo GetScreenSaverInfo(string filename)
{
    IntPtr hLibrary = IntPtr.Zero;
    try
    {
        hLibrary = LoadLibrary(filename);
        StringBuilder sb = new StringBuilder(1024);
        LoadString(hLibrary, 1, sb, sb.Capacity);
        return new ScreenSaverInfo
        {
            FileName = filename,
            Name = sb.ToString()
        };
    }
    finally
    {
        if (hLibrary != IntPtr.Zero)
            FreeLibrary(hLibrary);
    }
}

[DllImport("kernel32.dll")]
static extern IntPtr LoadLibrary(string lpFileName);

[DllImport("kernel32.dll")]
static extern bool FreeLibrary(IntPtr hLibrary);

[DllImport("user32")]
static extern int LoadString(IntPtr hInstance, int wID, [Out] StringBuilder lpBuffer, int nBufferMax);