private void _openAuthorizationPage()
{
string url = this._oauthConfig.UserAuthorizationUrl;
string oauth_token = this._oauthConfig.OauthToken;
List<QueryParameter> parameters = new List<QueryParameter>();
parameters.Add(new QueryParameter("oauth_token", oauth_token));
url += "?oauth_token=" + oauth_token;
System.Diagnostics.Process.Start(url);
}