Required fields one of two fields
<p>I am writing in asp.net c#.</p>

<p>I want a control similiar to RequiredFieldValidator except I want one of two fields to be required. I found an excellent example for two text fields but in my case one field is a check box and the other is an text box. If the check box is not checked the text box must be entered. </p>

<p>Any thoughts? </p>
