title: ASP.NET MVC Razor Multi select listbox as a checkbox
body: <p>Is this really not built-in yet? Do I have to download and install some plugin to accomplish this? </p>
  
  <p>If so - what are your favorite ones to implement a listbox that uses checkboxes?</p>
  
  <p>I feel like there should be a "type" property and checkbox be an option on the HTML ListBoxFor!</p>