using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            [

              ""yahoo!"",

              [

                ""yahoo mail"",

                ""yahoo finance"",

                ""yahoo news"",

                ""yahoo mail login"",

                ""yahoo sports"",

                ""yahoo fantasy football"",

                ""yahoo fantasy"",

                ""yahoo india"",

                ""yahoo groups"",

                ""yahoo search""

              ]

            ]";

​

        JArray outer = JArray.Parse(json);

        string keyword = (string)outer[0];

        List<string> results = outer[1].ToObject<List<string>>();

        Console.WriteLine(keyword);

        Console.WriteLine(string.Join("\r\n", results));

    }

}