jsonutility doesnt exist in the current context

Question

I am working on converting a string into json format and sending the json formatted data to the server.Everything is working fine. I tested the project and exported the project.Current version of Unity I am using is Unity 5.3.5.

the problem is that when I imported this project package in Unity 4.7. Iam getting an error

"The name "JsonUtility" does not exist in the current context"

How can I resolve this issue by replacing with other function so as that get worked with Unity 4.7

Here is piece of code is used for converting into json format

  using UnityEngine;
  using System.Collections;
  using LitJson;
  //using SimpleJSON;

  using System.IO;
  public class JsonScript : MonoBehaviour {
  JsonData json;
  void Start()
   {
    Data1 data = new Data1();
    data.command = "state";
    data.payload = new Payload1() { text = "wwwwwww", image = "hello" };
    string json = JsonUtility.ToJson(data,true);
    P(json + "\t\n");

    }

// Use this for initialization
void P(string aText)
{
    print (aText +"\n");
}

 }

 [System.Serializable]
 public class Payload1
 {
    public string text;
    public string image;

   }

   [System.Serializable]
    public class Data1
     {
      public string command;
     public Payload1 payload;
     }

Answer 1

According to the changelog of the documentation, the class JsonUtility was added in Unity Version 5.3.6. You said you used it in 5.3.5, so this seems to be incorrect. The earliest mentioning of it I could find is the release announcement for 5.3 which talks about "A new JSON API, that supports conversion of objects to and from JSON format".

So apparently the class JsonUtility requires at least Unity 5.3.

If you need JSON encoding and decoding in an earlier version of Unity, you will have to use a 3rd party library (or write your own).