title: Cannot add the Signalr Client library as a portable library to a Xamarin project
body: <p>I have tried adding the <a href="https://www.nuget.org/packages/Microsoft.AspNet.SignalR.Client/" rel="nofollow noreferrer">Signalr Client library</a> and the <a href="https://www.nuget.org/packages/Microsoft.AspNet.WebApi.Client/" rel="nofollow noreferrer">WebApi client</a> package to my Xamarin Solution (on Visual Studio with Xamarin Support and also on Xamarin Studio) but I always get this error although I am able to install other PCLs (for example Microsoft.Net.Http):</p>
  
  <pre><code>Could not install package 'Microsoft.AspNet.WebApi.Client 5.2.3'. You are trying to install this package into a project that targets 'portable-net45+sl50+win+wpa81+wp80+MonoAndroid10+xamarinios10+MonoTouch10', 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.
  </code></pre>
  
  <p>and the following error when adding Signalr:</p>
  
  <pre><code>Adding Microsoft.AspNet.SignalR.Client...
  Adding 'Microsoft.AspNet.SignalR.Client 2.2.0' to Corda.Client.
  Could not install package 'Microsoft.AspNet.SignalR.Client 2.2.0'. You are trying to install this package into a project that targets 'portable-net45+sl50+win+wpa81+wp80+MonoAndroid10+xamarinios10+MonoTouch10', 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.
  </code></pre>
  
  <p>I have also tried changing the the target framework with not success.
  This is the build setting for my project:
  <a href="https://i.stack.imgur.com/9vIzf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9vIzf.png" alt="Project settings"></a></p>
  
  <p>and this is my C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETPortable\v4.5\Profile\Profile259\SupportedFrameworks folder:
  <a href="https://i.stack.imgur.com/yFBUR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yFBUR.png" alt="PCL profiles folder"></a></p>
  
  <p>I get the same errors on both Mac OSX and Windows 10. Any ideas?</p>