using Newtonsoft.Json;

class A
        {
            public string Name { get; set; }
            public int Age { get; set; }
        }

 public static void Test()
        {
            A test = new A() { Name = "张三", Age = 18 };
            var jsonstr = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(JsonConvert.SerializeObject(test));
            Console.WriteLine("jsonstr=" + jsonstr);
            Console.Read();
        }