facebook - 如何在facebook c# sdk中调用friends.add方法

Question

如何在facebook c# sdk中调用friends.add方法以下是我的代码，它不起作用

        var fb = new FacebookClient(accessToken);

        dynamic parameters = new ExpandoObject();


        parameters.appId = "888888888888";
        parameters.message = "sample Friend Request";
        parameters.friendID = "888888888888";
        parameters.method = "friends.add";

        dynamic id1 = fb.Post(parameters);