Xamarin Forms Dependency Service definition issue

Question

I'm developing and app with Xamarin and I'm trying to follow this guide in order to implement and interface for Xamarin Forms for UWP.

So I wrote in PCL this interface:

namespace MyApp {
public interface ISimplePdfLoader {

    void OpenLocal(string uri);

    void Load(object pdfDoc);
  }
}

and in MyApp.UWP I created a class:

[assembly: Dependency(typeof(SimplePdfLoader))]
namespace MyApp.UWP {
public class SimplePdfLoader : ISimplePdfLoader {

    public async void OpenLocal(string uri) {
        ...

        Load(doc);
    }

    public async void Load(object pdfObj) {
        ...
        }
    }
}
}

But it continues to show the error CS7036 No arguments matching the mandatory formal parameter 'loadHintArgument' of 'DependencyAttribute.DependencyAttribute (string, LoadHint)' were specified MyApp.UWP C:\Users...\workspace\my-app\MyApp\MyApp.UWP\SimplePdfLoader.cs 19 and I can not compile the project.

edit: The error is show underlying the line [assembly: Dependency(typeof(SimplePdfLoader))]

Answer 1

Remove the below line from top usings section

using System.Runtime.CompilerServices;

and add the below

using Xamarin.Forms;