ServiceStack DateTime数据类型转Json出现的困扰

    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            JsConfig<DateTime>.SerializeFn = time => new DateTime(time.Ticks, DateTimeKind.Local).ToString("o");
            JsConfig<DateTime?>.SerializeFn =
                time => time != null ? new DateTime(time.Value.Ticks, DateTimeKind.Local).ToString("o") : null;
            JsConfig.DateHandler = DateHandler.ISO8601;

            app.UseServiceStack(new AppHost());

            app.Run(context =>
            {
                context.Response.Redirect("/metadata");
                return Task.FromResult(0);
            });
        }
    }