.net core使用Newtonsoft.Json进行序列化处理解决返回值首字母小写

var response = context.HttpContext.Response;
            response.ContentType = "application/json";
            var setting=new JsonSerializerSettings();
            setting.ContractResolver = new CamelCasePropertyNamesContractResolver();  //使用驼峰样式
            var result = JsonConvert.SerializeObject(Data,setting);
            response.WriteAsync(result);

services.AddMvc().AddJsonOptions(options =>
        {
            //忽略循环引用
            options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
            //不使用驼峰样式的key
            options.SerializerSettings.ContractResolver = new DefaultContractResolver();
            //设置时间格式
            options.SerializerSettings.DateFormatString = "yyyy-MM-dd";
        });