I have the following code that works:

private string GetMovieCert(int ID)
        {
            try
            {
                var client = new RestClient("https://api.themoviedb.org/3/movie/" + ID.ToString() + "/release_dates?api_key=###");
                var request = new RestRequest(Method.GET);
                request.AddParameter("undefined", "{}", ParameterType.RequestBody);
                IRestResponse response = client.Execute(request);

                List<char> items = response.Content.ToList<char>();               

                // Char version
                int hit = 0;
                string allres = "";
                foreach (var item in items)
                {
                    string f = item.ToString();
                    allres = allres + item.ToString();
                    if (f == "}")
                    {
                        if (allres.Contains("iso_3166_1\":\"US")) hit |= 3;
                        // if (allres.Contains("iso_3166_1")) hit |= 1;
                        // if (allres.Contains("US")) hit |= 2;
                        if (allres.Contains("\"certification\":\"\"")) hit |= 4;
                        if (hit == 3) break;
                        allres = "";
                        hit &= 3;
                    }
                    if (f == "]") hit = 0;
                }

                int pFrom = allres.IndexOf("certification") + "certification".Length;
                int pTo = allres.LastIndexOf("iso_639_1");

                String result = allres.Substring(pFrom, pTo - pFrom);
                return result.Split(':')[1].Replace(",", "").Replace("\"", ""); 
            }
            catch { return ""; }
        }

Is there a cleaner, more direct way to accomplish this? Using Linq or a JSON parser?

Thanks!