Regular Expression pattern match

regex.cs

int nominator = Nominiators.FOUR;
int denominator = Denominators.FOUR;
int tempo = Tempos.ONEFOURTY;

FileInfo fi = new FileInfo(filename);

string pattern = @"^filename-(\d+)-(\d+)-(\d+)\.txt$";
Regex re = new Regex(pattern);
Match chunks = re.Match(fi.Name);
if(chunks.Groups.Count == 4)
{
  nominator = int.Parse(chunks.Groups[1].Value);
  denominator = int.Parse(chunks.Groups[2].Value);
  tempo = int.Parse(chunks.Groups[3].Value);
}