I am trying to us a custom validator to check if a textbox is empty and then display a message to the user that the field must be filled
<p>Here is what I have. I appreciate any suggestions.</p>

<pre><code>protected void CustomValidator4_ServerValidate(object sender, ServerValidateEventArgs e)
{
    string n;
    e.IsValid = string.Empty(e.Value, out n);
}
</code></pre>
