title: .Net Regex ValidationExpression ASCII
body: <p>Anyone know a good Regex expression to drop in the ValidationExpression to be sure that my users are only entering ASCII characters?  </p>
  
  <pre><code>&lt;asp:RegularExpressionValidator id="myRegex" runat="server" ControlToValidate="txtName" ValidationExpression="???" ErrorMessage="Non-ASCII Characters" Display="Dynamic" /&gt;
  </code></pre>