C#獲取上級文件夾路徑

/// <summary>
        /// 獲取上級文件夾路徑
        /// </summary>
        /// <param name="path">路徑</param>
        /// <param name="degree">級數</param>
        /// <returns></returns>
        private string GetParentDirectory(string path, int degree)
        {
            DirectoryInfo pathInfo = new DirectoryInfo(path);
            string newPath = pathInfo.Parent.FullName;

            for (int i = 0; i < degree; i++)
            {
                pathInfo = new DirectoryInfo(newPath);
                newPath = pathInfo.Parent.FullName;
            }
            return newPath;
        }