JAVASCRIPT

c# json get value by key

string jsonData = @"{
'FirstName':'Pietie',
'LastName':'Massimo'
}";

var details = JObject.Parse(jsonData);
var firstName = details["FirstName"]

or 

dynamic details = JObject.Parse(jsonData);
var firstName = details.FirstName;

c# get value from json object

using System;
using Newtonsoft.Json.Linq;

namespace testClient
{
    class Program
    {
        static void Main()
        {
            var myJsonString = "{report: {Id: "aaakkj98898983"}}";
            var jo = JObject.Parse(myJsonString);
            var id = jo["report"]["Id"].ToString();
            Console.WriteLine(id);
            Console.Read();
        }
    }
}