Azure Functions issue?

I’m creating an Azure Function to act as a backend for an Alexa skill.

All I’ve done so far in Visual Studio:

1. File -> New Azure Functions project
2. Add new Azure Function
3. Add AlexaSkillsKit.NET with NuGet
4. Create a shell of a Speechlet implementation
5. Add the minimum code to the Azure Function to process the speechlet

When I compile, I get an error:

Could not load file or assembly ‘Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies. The system cannot find the file specified.

But according to NuGet in Visual Studio, it’s not trying to use 7.0.0.0, it’s using 9+. I’ve tried updating and downgrading the JSON.net package. I’ve tried Clean/Rebuild/restarting from scratch.

I thought that maybe assembly binding might be the answer, but there’s no Web.config or App.config in an Azure Functions project.

What am I missing? How do I get rid of this error?

Speechlet code:

public class MySpeechlet : SpeechletBase, ISpeechletWithContextAsync
{
    public Task<SpeechletResponse> OnIntentAsync(IntentRequest intentRequest, Session session, Context context)
    {
        throw new System.NotImplementedException();
    }

    public Task<SpeechletResponse> OnLaunchAsync(LaunchRequest launchRequest, Session session, Context context)
    {
        throw new System.NotImplementedException();
    }

    public Task OnSessionStartedAsync(SessionStartedRequest sessionStartedRequest, Session session, Context context)
    {
        throw new System.NotImplementedException();
    }

    public Task OnSessionEndedAsync(SessionEndedRequest sessionEndedRequest, Session session, Context context)
    {
        throw new System.NotImplementedException();
    }
}

Azure Function:

public static class MyFunction
{
    [FunctionName("MyFunction")]
    public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)]HttpRequestMessage req, TraceWriter log)
    {
        var speechlet = new MySpeechlet();
        return await speechlet.GetResponseAsync(req);
    }
}

I think this may be an issue with the Azure Functions SDK, but is there some way to workaround it?

[ElvenMonky]

Finally I had to deal with this error, as I was unable to publish my Function to Azure.

It seems to be a known issue in Azure function generator.

The solution is to mark your custom speechlet class as internal. Alternatively, you can move speechlet class to separate project as mentioned by @mgroves

Note: To make speechlet visible for unit tests project, add AssemlyInfo.cs to Function’s Properties folder and put [assembly: InternalsVisibleTo("MySkill.UnitTests")] attribute there.

[ElvenMonky]

Can we close it, as it is more of Azure issue and there is not much we can do, apart from releasing .Net Core library version?