title: Unable to install System.Net.Http in Xamarin portable project
body: <p>Hello I'm new to Xamarin,
  I'm trying to install the System.Net.Http to a Xamarin portable project using NuGet Package Manager.
  However, whenever I try to download it I get this error</p>
  
  <blockquote>
    <p>Could not install package 'System.Net.Http 4.3.1'. You are trying to install this package into a project that targets '.NETPortable,Version=v4.5,Profile=Profile259', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author</p>
  </blockquote>
  
  <p>I tried every possible version of the package with no use. Could anybody provide some assistance?</p>