Azure Functions with IoC Container

FunctionFactory.cs

public class FunctionFactory : IFunctionFactory
{
    private readonly IContainer _container;

    public FunctionFactory(RegistrationHandler handler = null)
    {
        // Create the Autofac container directly from
        // Autofac container builder.
        this._container = new ContainerBuilder()
                              .RegisterModule<AppModule>(handler)
                              .Build();
    }

    public TFunction Create<TFunction>(TraceWriter log)
        where TFunction : IFunction
    {
        // Resolve the function instance directly from the container.
        var function = this._container.Resolve<TFunction>();
        function.Log = log;

        return function;
    }
}