Checks zippopotam.us to see if a zip code is valid

ZC.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;

namespace ZC
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var client = new WebClient())
            {
                if (args.Length == 0)
                {
                    args = new[] { "79088" };
                }

                try
                {
                    var query = String.Format("http://www.zippopotam.us/us/{0}", args[0]);

                    var result = JsonConvert.DeserializeObject<QueryResult>(client.DownloadString(query));
                    Console.WriteLine("{0}, {1}", result.Places.Single().PlaceName, result.Places.Single().State);
                }
                catch (WebException e)
                {
                    if ((e.Response as HttpWebResponse).StatusCode == HttpStatusCode.NotFound)
                    {
                        Console.WriteLine("Invalid zip");
                    }
                    else
                    {
                        Console.WriteLine("Unable to serve your request");
                    }
                }
            }
        }
    }

    public class Place
    {
        [JsonProperty("place name")]
        public string PlaceName { get; set; }
        
        public double Longitude { get; set; }
        
        public double Latitude { get; set; }
        
        public string State { get; set; }

        [JsonProperty("state abbreviation")]
        public string StateAbbreviation { get; set; }
    }

    public class QueryResult
    {
        [JsonProperty("post code")]
        public string PostCode { get; set; }

        public string Country { get; set; }

        [JsonProperty("country abbreviation")]
        public string CountryAbbreviation { get; set; }

        public ICollection<Place> Places { get; set; }
    }
}