/// <summary>
        ///
        /// </summary>
        /// <param name="authorizeInfo"></param>
        /// <param name="oauthVerifier"></param>
        /// <returns></returns>
        public OAuth1AccessToken GetAccessToken(OAuth1AuthorizeInfo authorizeInfo, String oauthVerifier)
        {
            var ai = authorizeInfo;
            var cm = new GetRequestTokenCommand(this.ConsumerKey, this.ConsumerSecret
                                                , ai.RequestToken, ai.RequestTokenSecret, HttpMethodName.Post);
            var si = OAuth1Client.GenerateSignature(new Uri(this.AccessTokenUrl), cm, OAuthSignatureTypes.HMACSHA1);
            HttpRequestCommand command = new HttpRequestCommand(String.Format("{0}?{1}&oauth_verifier={2}&oauth_signature={3}"
                                                                              , this.AccessTokenUrl, si.NormalizedRequestParameters, oauthVerifier, si.Signature), HttpMethodName.Post);
            var res = this.GetResponse(command);

            return(OAuth1AccessToken.Create(res.BodyText));
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="requestToken"></param>
        /// <param name="requestTokenSecret"></param>
        /// <returns></returns>
        public OAuth1AccessToken GetAccessToken(String requestToken, String requestTokenSecret)
        {
            String url = this.AccessTokenUrl;
            GetRequestTokenCommand cm = new GetRequestTokenCommand(this.ConsumerKey, this.ConsumerSecret
                                                                   , requestToken, requestTokenSecret, HttpMethodName.Post);
            SignatureInfo      si      = OAuth1Client.GenerateSignature(new Uri(url), cm, OAuthSignatureTypes.HMACSHA1);
            HttpRequestCommand command =
                new HttpRequestCommand(String.Format("{0}?{1}&oauth_signature={2}", url, si.NormalizedRequestParameters, si.Signature), HttpMethodName.Post);
            var res = this.GetResponse(command);

            return(OAuth1AccessToken.Create(res.BodyText));
        }