public override IServiceProvider ConfigureServices(IServiceCollection services)
{
    services.AddProjectSpecificStuff();

    ITraceWriter traceWriter = null;

    services.AddMvc().AddJsonOptions(options =>
    {
        options.SerializerSettings.TraceWriter = traceWriter;
    });

    var provider = base.ConfigureServices(services);

    traceWriter = provider.GetService<ITraceWriter>();

    return provider;
}