C#去除文件夹只读属性

/// <summary>
/// 去除文件夹只读属性
/// </summary>
/// <param name="strPath">文件夹物理路径</param>
public static bool SetDirAttrNormal(string strPath)
{
    bool success = true;
    try
    {
        string[] strFiles = Directory.GetFiles(strPath);
        string[] strDirs = Directory.GetDirectories(strPath);

        int fileCount = strFiles.Length;
        for (int i = 0; i < fileCount; i++)
        {
            File.SetAttributes(strFiles[i], FileAttributes.Normal);
        }

        int dirCount = strDirs.Length;
        if (dirCount > 0)
        {
            for (int i = 0; i < dirCount; i++)
            {
                SetDirAttrNormal(strDirs[i]);
            }
        }
    }
    catch { success = false; }

    return success;
}