Retrieving JSON data and parsing in C#

I had to retrieve JSON data and parse the information in C#, as I need to retrieve bitcoin rates between different bitcoin operators.

A quick research brings me to a Stackoverflow question on how to achieve this.

Retrieving the JSON data from the bitcoin operator URL, I got the following raw data.

{"ask":"760.00","bid":"720.00"}

Following the Stackoverflow question, I quickly coded up the following routine which is what I learnt in a few minutes. Basically, the trick is to declare a structure class which contains the same field names as the JSON object, and I'm done! Oh wait, not so fast! I have to download the JSON library first. For that, I went to James Newton-King's page and got it.

    class BitcoinRate
    {
        public double ask;
        public double bid;
    }

    class Program
    {
        private const float ValueInMyCurrency = 1.0f; // Actual value different

        static void Main(string[] args)
        {
            using (WebClient webClient = new System.Net.WebClient())
            {
                String json = webClient.DownloadString(URL);
                BitcoinRate tmp = JsonConvert.DeserializeObject<BitcoinRate>(json);
                double bitcoinValue = ValueInMyCurrency / tmp.bid;
                bitcoinValue = Math.Round(bitcoinValue, 3, MidpointRounding.AwayFromZero)+0.001;
            }
        }
    }

Started up Visual Studio, and hurray, the code is correct!