How to reference .less files in _Layout
<p>I am using Bootstrap 3 Datepicker to use the DateTimePicker and I have downloaded the Nuget Package for this.  </p>

<p>Now it is downloaded but I am unable to reference the files in my <code>_Layout</code> Shared view.  I try to just drag and drop the file in there and then change the syntax to the razor style <code>@Styles.Render("~/xxx/xxx")</code>but everytime I try to drop it, nothing happens.</p>

<p>Is there something that I am missing. How do I reference these?</p>