using System;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Datum

  {

    public string zipcode { get; set; }

    public string line1 { get; set; }

    public string city { get; set; }

    public string state { get; set; }

    public string cid { get; set; }

  }

​

public class RootObject

{

    public List<Datum> data { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        string json = "{ \"data\": [" +

            "{\"zipcode\":\"56033\",\"line1\":\"610 4TH ST\",\"city\":\"FROST\",\"state\":\"MN\",\"cid\":\"1770\"}," +

            "{\"zipcode\":\"56033\",\"line1\":\"45375 30TH ST\",\"city\":\"FROST\",\"state\":\"MN\",\"cid\":\"1771\"}," +

            "{\"zipcode\":\"56033\",\"line1\":\"115 4TH ST\",\"city\":\"FROST\",\"state\":\"MN\",\"cid\":\"1772\"}" +

            "]}";

        var lines = JsonConvert.DeserializeObject<RootObject>(json);

        Console.WriteLine(lines.data.Count);

​

    }

}