Set Default/Null Value with Select TagHelper : <p>In asp.net mvc you can use:</p>

<pre><code>@Html.DropDownListFor(model =&gt; model.Category, ViewBag.Category as IEnumerable&lt;SelectListItem&gt;, "-- SELECT --", new { @class = "form-control" })
</code></pre>

<p>Using asp.net 5, how do I include the default or null value <strong>(-- SELECT --)</strong>  in a taghelper:</p>

<pre><code>&lt;select asp-for="Category" asp-items="@ViewBag.Category"  class="form-control"&gt;&lt;/select&gt;
</code></pre>
