public static string GetFileNameWithoutExtension(string path)
        {
            path = GetFileName(path);
            if (path != null)
            {
                int i;
                if ((i = path.LastIndexOf('.')) == -1)
                    return path; // No path extension found
                else
                    return path.Substring(0, i);
            }
            return null;
        }

        public static string GetFileName(string path)
        {
            if (path != null)
            {

                int length = path.Length;
                for (int i = length; --i >= 0;)
                {
                    char ch = path[i];
                    if (ch == DirectorySeparatorChar || ch == AltDirectorySeparatorChar || ch == VolumeSeparatorChar)
                        return path.Substring(i + 1, length - i - 1);

                }
            }
            return path;
        }