title: ASP.Net MVC2: ModelState is invalid, but I don't know why
body: <p>I'm using MVC2 with data annotations for validation on my page. I require a name and a valid birth date to be present. I'm providing both, and I break into the date validator to ensure that the birth date is valid (and it is), but for some reason Model.IsValid is false in my post action. I'm not seeing anything in my ValidationSummary.</p>
  
  <p>How can I find out what is invalid in the ModelState?</p>