title: System.NotImplementedException: 'This functionality is not implemented in the portable version of this assembly
body: <p>I have added <code>Plugin.MediaManager</code> and <code>Plugin.MediaManager.Forms</code> into my <code>xamarin forms</code> project for playing video. </p>
  
  <pre><code>CrossMediaManager.Current.Init(this);
  </code></pre>
  
  <p>when I am trying to add above code, it shows error (No overload for method Init();)</p>
  
  <p>But getting below exception on android when running the project with below line of code.</p>
  
  <pre><code>CrossMediaManager.Current.Init();
  </code></pre>
  
  <blockquote>
    <p>System.NotImplementedException: 'This functionality is not implemented in the portable version of this assembly. You should reference the NuGet package from your main application project in order to reference the platform-specific implementation.'</p>
  </blockquote>
  
  <p>IOS and UWP apps are working fine, only android project has this issue. Please help me to fix this.</p>