title: MVC regex to not allow spaces and special characters
body: <p>I have a Regex to not allow spaces and some special chars., but the validation fires even when Uppercase letters are entered.</p>
  
  <pre><code>[RegularExpression(@"^[^&lt;&gt;.,?;:'()!~%-_@#%/*""\s]+$")]
  public string FirstName { get; set; }
  </code></pre>