using System;

using Newtonsoft.Json;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var input = "[[\"name\", \"surname\", \"street\", \"phone\"],\r\n\t[\"alex\", \"smith\", \"sky blue way\", \"07747233279\"],\r\n\t[\"john\", \"patterson\", \"richmond street\", \"07658995465\"]]";

        var results = JsonConvert.DeserializeObject<List<List<string>>>(input);

        foreach (var item in results)

            Console.WriteLine(  string.Join(", ", item));

    }

}