title: How to call REST services from Portable Class Library?
body: <p>My target projects are Windows 8, WinRT and Windows Phone 8. I am using Portable Class Libraries for the solution in order to share the sources.
  I need to call some REST services created in another MVC Web Api project but <code>HttpClient</code> class is not available in the PCL.
  Which would be a good approach to solve it?
  I was thinking in a service interface and then to create a project for each platform, using <code>HttpClient</code>, <code>WebClient</code>  or the appropriate class in each case. This approach could work but I was wondering if there are other ways.</p>