//
// GET: /RSVP/RsvpBegin
public ActionResult RsvpBegin(string identifier, int id)
{
Uri returnTo = new Uri(new Uri(Realm.AutoDetect), Url.Action("RsvpFinish"));
IAuthenticationRequest request = relyingParty.CreateRequest(identifier, Realm.AutoDetect, returnTo);
request.SetUntrustedCallbackArgument("DinnerId", id.ToString(CultureInfo.InvariantCulture));
request.AddExtension(new ClaimsRequest {
Email = DemandLevel.Require, FullName = DemandLevel.Request
});
return(request.RedirectingResponse.AsActionResult());
}