title: @Html.RadioButtonFor Default to Unchecked
body: <p>In ASP.NET MVC4's Razor view, how to ensure none of the radio buttons default to unchecked?  MVC seems to check one for me even I don't declare to check one in the following codes.</p>
  
  <pre><code>@Html.RadioButtonFor(model =&gt; model.test, true, new { id = "radio_test_True"}) Yes
  @Html.RadioButtonFor(model =&gt; model.test, false, new { id = "radio_test_False"}) No
  </code></pre>
  
  <p>Thanks</p>