Recursive Directory Search

        /// <summary>
        /// Recursively searches a directory for filenames using the given filters
        /// </summary>
        /// <param name="rootDir">Root directory to begin search</param>
        /// <param name="filters">Formatted search filters for filenames</param>
        /// <returns>Collection of files found in root directory and all subdirectories that
        /// matched the given filter(s).</returns>
        public static List<string> DirectorySearch(string rootDir, params string[] filters)
        {
            List<string> fileList = new List<string>();
            foreach (string filter in filters)
                fileList.AddRange(Directory.GetFiles(rootDir, filter));
            foreach (string dir in Directory.GetDirectories(rootDir))
                fileList.AddRange(DirectorySearch(dir, filters));
            return fileList;
        }