public string getRequestToken()
{
string oauth_token = this._oauthConfig.OauthToken;
OAuthRequest request = new OAuthRequest(this, base._debugType);
string tokens = request.request(new Uri(this._oauthConfig.RequestTokenUrl), "GET", oauth_token, "", null).ToString();
if (tokens == String.Empty || tokens.Length == 0) return null;
// Save Tokens in Configuration
this._saveTokenDataInConfiguration(tokens);
// Open Authorization Page
this._openAuthorizationPage();
return tokens;
}