title: Regex Expressions for all non alphanumeric symbols
body: <p>I am trying to make a regular expression for a string that has at least 1 non alphanumeric symbol in it</p>
  
  <p>The code I am trying to use is</p>
  
  <pre><code>Regex symbolPattern = new Regex("?[!@#$%^&amp;*()_-+=[{]};:&lt;&gt;|./?.]");
  </code></pre>
  
  <p>I'm trying to match only one of <code>!@#$%^&amp;*()_-+=[{]};:&lt;&gt;|./?.</code> but it doesn't seem to be working.</p>