protected void Page_Load(object sender, EventArgs e) { FacebookLogin fblog = new FacebookLogin(AppId, ExtendedPermissions); FacebookOAuthResult oauthResult; if (fblog._fb.TryParseOAuthCallbackUrl(fblog._loginUrl, out oauthResult)) { // The url is the result of OAuth 2.0 authentication Response.Write(oauthResult.AccessToken); } else { // The url is NOT the result of OAuth 2.0 authentication. Response.Redirect(fblog._loginUrl.AbsoluteUri); } }