owin – 如何在Startup.cs中添加CamelCasePropertyNamesContractResolver？

public void Configure(IApplicationBuilder app)
{
    // Setup configuration sources
    var configuration = new Configuration();
    configuration.AddJsonFile("config.json");
    configuration.AddEnvironmentVariables();

    // Set up application services
    app.Useservices(services =>
    {
        // Add EF services to the services container
        services.AddEntityFramework()
           .AddSqlServer();

        // Configure DbContext
        services.SetupOptions<DbContextOptions>(options =>
        {
           optionS.UseSqlServer(configuration.Get("Data:DefaultConnection:ConnectionString"));
        });

        // Add Identity services to the services container
        services.AddIdentitySqlServer<ApplicationDbContext,ApplicationUser>()
           .AddAuthentication();

        // Add MVC services to the services container
        services.AddMvc();
    });

    // Enable Browser Link support
    app.UseBrowserLink();

    // Add static files to the request pipeline
    app.UseStaticFiles();

    // Add cookie-based authentication to the request pipeline
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        Authenticationtype = claimsIdentityOptions.DefaultAuthenticationType,LoginPath = new PathString("/Account/Login"),});

    // Add MVC to the request pipeline
    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",template: "{Controller}/{action}/{id?}",defaults: new { controller = "Home",action = "Index" });

        routes.MapRoute(
            name: "api",template: "{Controller}/{id?}");
    });
}

在哪里可以访问httpConfiguration实例，以便我可以设置CamelCasePropertyNamesContractResolver，就像我在WebApi 2中所做的那样：

var formatterSetTings = config.Formatters.JsonFormatter.serializerSetTings;
formatterSetTings.FormatTing = FormatTing.None;
formatterSetTings.ContractResolver = new CamelCasePropertyNamesContractResolver();