title: Regex to match everything except a list of characters
body: <p>I want to match a line containing everything except the specified characters <code>[I|V|X|M|C|D|L]</code>.</p>
  
  <pre><code>new Regex(@"^(.*) is (?![I|V|X|M|C|D|L].*)$")
  </code></pre>
  
  <p>should match everything except the characters mentioned in the <code>OR</code> list.</p>
  
  <p>Should match - </p>
  
  <pre><code>name is a
  </code></pre>
  
  <p>Should not match - </p>
  
  <pre><code>edition is I
  </code></pre>