Facebook.FacebookOAuthClient.OAuthRequest C# (CSharp) Method

        internal protected virtual string OAuthRequest(string name, string path, IDictionary<string, object> parameters)
        {
            Contract.Requires(!String.IsNullOrEmpty(name));

            var mergedParameters = FacebookUtils.Merge(null, parameters);

            path = FacebookUtils.ParseQueryParametersToDictionary(path, mergedParameters);

            if (!string.IsNullOrEmpty(path) && path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
            {
                path = path.Substring(1, path.Length - 1);
            }

            var requestUrl = GetUrl(name, path, parameters);

            var webClient = WebClient;

            string responseString = null;
            try
            {
                var resultData = webClient.DownloadData(requestUrl);
                if (resultData != null)
                {
                    responseString = Encoding.UTF8.GetString(resultData);
                }
            }
            catch (WebExceptionWrapper ex)
            {
                responseString = FacebookUtils.GetResponseString(ex);
            }

            // todo: make sure the url is graph url then only check for graph exception
            var graphException = ExceptionFactory.GetGraphException(responseString);

            if (graphException != null)
            {
                throw graphException;
            }

            return responseString;
        }
#endif