title: evaluate filename with regex
body: <p>I have a bit of code to evaluate a filename using a regex, this works fine, but I want to add in a 2<sup>nd</sup> pattern of <code>out_\d\d\d\d\d\d_</code> (then up to 150 character to hold an address).
  Obviously I don't want to have <code>\d</code> 150 times, can anyone tell me the best way to to this?</p>
  
  <p>thanks</p>
  
  <pre><code>REGEX_PATTERN = @"out_\d\d\d\d\d\d";
  
  if (!Regex.Match(Path.GetFileNameWithoutExtension(e.Name), REGEX_PATTERN).Success) {
    return;
  }
  </code></pre>