// This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers()
            .AddNewtonsoftJson(options =>
                {
                    // Use the default property (不改变元数据的大小写) casing
                    options.SerializerSettings.ContractResolver = new DefaultContractResolver();
                });
        }