title: Regex for alphanumeric and special characters
body: <p>I need to define a regular expression that accepts Alphanumeric and the following special characters:
  @#$%&amp;*()-_+][';:?.,!</p>
  
  <p>I've come up with:</p>
  
  <pre><code>string pattern = @"[a-zA-Z0-9@#$%&amp;*+\-_(),+':;?.,![]\s\\/]+$";
  </code></pre>
  
  <p>But this doesn't seem to be working. Can someone please let me know what is missing?</p>