public ulong GetUserId(string signedRequest) { var client = new global::Facebook.FacebookClient { AppId = Settings.AppId, AppSecret = Settings.AppSecret }; // var result = client.Get("oauth/access_token", new // { // client_id = client.AppId, // client_secret = client.AppSecret, // grant_type = "client_credentials" // }); // client.AccessToken = result.access_token; var userId = (client.ParseSignedRequest(signedRequest) as dynamic).user_id; return UInt64.Parse(userId); }