{
    "companyID": "15",
 
    "employees": [
        {
            "firstName": "Bill",
            "lastName": "Gates"
        },
        {
            "firstName": "George",
            "lastName": "Bush"
        }
    ],
 
    "manager": [
        {
            "salary": "6000",
            "age": "23"
        },
        {
            "salary": "8000",
            "age": "26"
        }
    ]
 
}

using Newtonsoft.Json;  
using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
using System.Threading.Tasks;  
  
namespace ConsoleJsonTest  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
  
            string jsonText = " {\"companyID\":\"15\",\"employees\":[{\"firstName\":\"Bill\",\"lastName\":\"Gates\"},{\"firstName\":\"George\",\"lastName\":\"Bush\"}],\"manager\":[{\"salary\":\"6000\",\"age\":\"23\"},{\"salary\":\"8000\",\"age\":\"26\"}]} ";  
            Console.WriteLine(jsonText);  
  
            RootObject rb = JsonConvert.DeserializeObject<RootObject>(jsonText);  
  
            Console.WriteLine(rb.companyID);  
  
            Console.WriteLine(rb.employees[0].firstName);  
  
            foreach (Manager ep in rb.manager)  
            {  
                Console.WriteLine(ep.age);  
            }  
  
            Console.ReadKey();  
        }  
    }  
  
    public class Employees  
    {  
        public string firstName { get; set; }  
        public string lastName { get; set; }  
    }  
  
    public class Manager  
    {  
        public string salary { get; set; }  
        public string age { get; set; }  
    }  
  
    public class RootObject  
    {  
        public string companyID { get; set; }  
        public List<Employees> employees { get; set; }  
        public List<Manager> manager { get; set; }  
    }  
}  

foreach (Manager ep in rb.manager)
 
{
 
Console.WriteLine(ep.age);
 
}