protected override void AppendOAuthInfo( HttpWebRequest webRequest, Dictionary< string, string > query)
{
webRequest.Headers.Add( "X-Verify-Credentials-Authorization", GetAuthorizationHeader("GET", this._serviceProvider, realm: this._realm.ToString()));
webRequest.Headers.Add( "X-Auth-Service-Provider", string.Format("{0}://{1}{2}", this._serviceProvider.Scheme, this._serviceProvider.Host, this._serviceProvider.AbsolutePath));
}