title: Class libraries in VS 2015 - Building Cross Platform Libraries
body: <p>There are different class libraries I can create in VS 2015 with Xamarin installed:</p>
  
  <ol>
  <li>Class Library</li>
  <li>Class Library (Android)</li>
  <li>Class Library (Package)</li>
  <li>Class Library (Portable for Universal Apps)</li>
  <li>Class Library (Portable)</li>
  <li>Class Library (Xamarin.Forms)</li>
  </ol>
  
  <p>I would love to know the difference between each - just a brief would do :)</p>
  
  <p><strong>The Scenario</strong></p>
  
  <p>Our team is currently developing a new project which we are targeting for multiple platforms - web and mobile (Xamarin) primarily. While we decided to focus on the MVC web app first, we want to create a single project to contain all models and business classes (logic) so that it can be used across our projects later on. Which class library would be the most appropriate?</p>