Razor Generating Html : <p>my razor code</p>

<pre><code>@Html.CheckBox("cbMSSProvider",true)
</code></pre>

<p>is generating HTML like</p>

<pre><code>    &lt;input checked="checked" id="cbHHAProvider" name="cbHHAProvider" type="checkbox" value="true"&gt;
    &lt;input name="cbHHAProvider" type="hidden" value="false"&gt;
</code></pre>

<p>Can some one tell why there is input(type=hidden)?</p>
