Useful class for Youtube integration

GoogleUtils.cs

using System.Net;
using Newtonsoft.Json;

namespace Utils
{
    public class GoogleUtils
    {
        private string _apiKey = "";
        private string _shortUrl = "https://www.googleapis.com/urlshortener/v1/url?fields=id%2ClongUrl%2Cstatus&key=";
        private string _urlYoutubeLastVideos = "https://www.googleapis.com/youtube/v3/search?key=";

        public GoogleUtils(string apiKey)
        {
            _apiKey = apiKey;
        }

        /// <summary>
        /// ConvertToShortUrl
        /// </summary>
        /// <param name="longUrl"></param>
        /// <returns>short url</returns>   
        public string ConvertToShortUrl(string longUrl)
        {
            string result = "";

            using (var client = new WebClient())
            {
                string json = "{ \"longUrl\": \"" + longUrl + "\" }";

                client.Headers[HttpRequestHeader.ContentType] = "application/json; charset=utf-8";
                result = JsonConvert.DeserializeObject<dynamic>(client.UploadString(_shortUrl + _apiKey, "POST", json)).id.ToString();
            }
            
            return result;

        }

        /// <summary>
        /// GetYoutubeList
        /// </summary>
        /// <param name="channelId"></param>
        /// <param name="count"></param>
        /// <returns>list to video based on the count</returns>   
        public object GetYoutubeList(string channelId, int count)
        {
            object result = null;

            using (var client = new WebClient())
            {
                client.Headers[HttpRequestHeader.ContentType] = "application/json; charset=utf-8";
                result = client.DownloadString(_urlYoutubeLastVideos + _apiKey + "&channelId=" + channelId + "&part=snippet,id&order=date&maxResults=" + count);
                result = JsonConvert.DeserializeObject<object>(result.ToString());
            }

            return result;
        }
    }
}