title: ASP.Net MVC Using AddModelError with multiple ValidationSummary for querystring validation
body: <p>I have a view with two forms each containing their own</p>
  
  <pre><code>@Html.ValidationSummary()
  </code></pre>
  
  <p>When the page is loaded, a querystring parameter is checked and if it exists I call:</p>
  
  <pre><code>ModelState.AddModelError("", "Querystring error");
  </code></pre>
  
  <p>However, this results in the error message appearing in both <code>@Html.ValidationSummary()</code> even if I specify a property in the form model.</p>
  
  <p>I have a work around which is to have a seperate error message property in the model for the form and populate that and then display it if it exists in a label, but wondered if it is possible to specify one individual <code>@Html.ValidationSummary()</code> within a form to allow me to use <code>ModelState.AddModelError</code>?</p>