Serialization and deserialization of JSON and k_backingfield of random entry

JSON data is needed today, so JSON serialization and deserialization is used. First of all, how to serialize:

1. Serialization and deserialization

First add the System.Runtime.Serialization reference

Object into a JSON file:

      public static string Objecttojson (Object obj)        {            DataContractJsonSerializer ser = new DataContractJsonSerializer (obj. GetType ());            using (MemoryStream ms = new MemoryStream ())            {                ser. WriteObject (MS, obj);                Return Encoding.Default.GetString (Ms. ToArray ());            }        }

JSON data converted to object

    public static T jsontoobject<t> (string json) where T:class        {            datacontractjsonserializer ser = new Datacont Ractjsonserializer (typeof (T));            using (MemoryStream ms = new MemoryStream (Encoding.Default.GetBytes (JSON)))            {                return (T) ser. ReadObject (MS);            }        }

The program is relatively simple I won't say much, just at the beginning the entity class is this:

  [Serializable]    Class User    {public int: Age        {get; set;}        public string Name {get; set;}        Public User (string name, int.)        {Age            = age;            name = name;        }    }

Then call:

    static void Main (string[] args)        {            var user1 = new User ("Zhangsan");            var users = new List<user> {user1, new User ("Lisi")};            var strUser1 = Objecttojson (user1);            var setusers = Objecttojson (users);        }

Add breakpoints to view JSON data,

Somehow there was a k__backingfield in the mess.

2. The K__backingfield solution of the random entry

From the Internet to find a lot of information and do not understand why this problem arises. If you want to know, you can refer to this. But the solution was found here:

You only need to change the entity class to the following form:

  [DataContract]    Class User    {        [DataMember] public        int Age {get; set;}        [DataMember]        public string Name {get; set;}        Public User (string name, int.)        {Age            = age;            name = name;        }    }

There will be no k__backingfield under surveillance. The call to convert JSON data to entities is also straightforward:

static void Main (string[] args)        {            var user1 = new User ("Zhangsan");            var users = new List<user> {user1, new User ("Lisi")};            var strUser1 = Objecttojson (user1);            var strusers = Objecttojson (users);            var user11 = jsontoobject<user> (strUser1);            var users1 = jsontoobject<list<user>> (strusers);        }

Serialization and deserialization of JSON and k_backingfield of random entry