use google maps api to get tax information in csharp

main.cs
using System;
using System.IO;
using System.Net;
using System.Web.Script.Serialization;

public class GoogleMapsApi
{
    private const string BASE_URL = "https://maps.googleapis.com/maps/api/place/details/json?key={0}&place_id={1}&fields=name,formatted_address,formatted_phone_number,website,rating,user_ratings_total,reviews&language=en";
    private string ApiKey;

    public GoogleMapsApi(string apiKey)
    {
        ApiKey = apiKey;
    }

    public string GetTaxInformation(string placeId)
    {
        string taxInfo = string.Empty;
        string url = string.Format(BASE_URL, ApiKey, placeId);

        try
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            if (response.StatusCode == HttpStatusCode.OK)
            {
                Stream stream = response.GetResponseStream();
                StreamReader reader = new StreamReader(stream);
                string responseJson = reader.ReadToEnd();
                JavaScriptSerializer serializer = new JavaScriptSerializer();
                dynamic result = serializer.Deserialize<dynamic>(responseJson);

                if (result["result"] != null && result["result"]["address_components"] != null)
                {
                    foreach (dynamic component in result["result"]["address_components"])
                    {
                        if (component["types"] != null && component["types"][0] == "tax")
                        {
                            taxInfo = component["long_name"];
                            break;
                        }
                    }
                }
            }
        }
        catch (Exception ex)
        {
            // handle exception
        }

        return taxInfo;
    }
}
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