title: @Html.DropDownListFor How to add option?
body: <pre><code>@Html.DropDownListFor(model =&gt; model.ZipFile, new SelectList(ViewBag.ZipFiles))
  </code></pre>
  
  <p>The above code creates me a select list just fine. But I want to make the selection optional. Unfortunately there is no empty option and I'd like to add one in. How would I do this?</p>