using System;

using System.Net;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        using (WebClient wc = new WebClient())

        {

            var json = wc.DownloadString("https://randomuser.me/api/");

            JToken token = JToken.Parse(json);

            string firstName = (string)token.SelectToken("results[0].name.first");

            string lastName = (string)token.SelectToken("results[0].name.last");

            string city = (string)token.SelectToken("results[0].location.city");

            string username = (string)token.SelectToken("results[0].login.username");

            Console.WriteLine("First name: " + firstName);

            Console.WriteLine("Last name: " + lastName);

            Console.WriteLine("City: " + city);

            Console.WriteLine("Username: " + username);

        }

    }

}