c# json

  class Program
    {
        static void Main(string[] args)
        {
            //实例化一个新的类，并赋值
            Data _Data = new Data() {  ID= 200};      

            //实体类转换为Json      
            string output = JsonConvert.SerializeObject(_Data);
            //Json转实体类
            Data _Data2 =  JsonConvert.DeserializeObject<Data>(output);

            //改变值
            _Data2.ID = 100;   
            
            //打印旧的值                                          
            Console.WriteLine(output);             
            //打印新的值  
            Console.WriteLine(JsonConvert.SerializeObject(_Data2));
            Console.ReadKey();
        }
    }

  
    class Data
    {
        /// <summary>
        /// ID
        /// </summary>
        public int ID { get; set; }           
        /// <summary>
        ///  包含的子类
        /// </summary>
        public Contact Contact { get; set; } = new Contact();
    }                              
                   
    class Contact
    {    
        public bool IsOK { get; set; } = true;
    }