How to change property/Attribute from JSON string in c#?

Question

I am having JSON string like

{"name":"studentname","Lastname":"lastnameofstudent"}

I want to change the name property/key to FirstName not the value of this property. using Newtonsoft JSON lib.

Example:

string json = @"{
  'name': 'SUSHIL'
}";
JObject obj = JObject.Parse(json);
var abc = obj["name"];
obj["name"] = "FirstName";
string result = obj.ToString();

Answer 1

The simplest way is probably just to assign a new property value, then call Remove for the old one:

using System;
using Newtonsoft.Json.Linq;

class Test
{
    static void Main()
    {
        string json = "{ 'name': 'SUSHIL' }";
        JObject obj = JObject.Parse(json);
        obj["FirstName"] = obj["name"];
        obj.Remove("name");
        Console.WriteLine(obj);
    }
}

Output:

{
  "FirstName": "SUSHIL"
}