PortableRest.RestRequest.AddParameter C# (CSharp) 메소드

        public void AddParameter(object value)
        {
            AddParameter("", value);
        }

        private async Task Authenticate()
        {
            var client = new RestClient
            {
                BaseUrl = "https://datamarket.accesscontrol.windows.net",
                UserAgent = UserAgent,
            };
            var request = new RestRequest("v2/OAuth2-13", HttpMethod.Post)
            {
                ContentType = ContentTypes.FormUrlEncoded,
                ReturnRawString = true,
            };
            request.AddParameter("client_id", ClientId);
            request.AddParameter("client_secret", ClientSecret);
            request.AddParameter("scope", "http://music.xboxlive.com");
            request.AddParameter("grant_type", "client_credentials");

            var result = await client.ExecuteAsync<string>(request);

            TokenResponse = JsonConvert.DeserializeObject<TokenResult>(result);
            if (TokenResponse != null)
            {
                TokenResponse.TimeStamp = DateTime.Now;
            }
        }