微软的liveSDK,模仿开发指南登陆代码,报错!该怎么解决

微软的liveSDK,模仿开发指南登陆代码,报错!
用了微软的liveSDK,模仿了Live Connect 开发者指南,想要实现用户登录就出问题了.没用登录控件,用LiveAuthClient:

      private static readonly string _ClientId="000000004C0760E7";

        private LiveConnectSession liveSession = null;

        public void LoginSky()
        {
            LiveAuthClient auth = new LiveAuthClient(_ClientId);
            auth.LoginCompleted += new EventHandler<LoginCompletedEventArgs>(auth_LoginCompleted);
            auth.LoginAsync(new string[] {"wl_signin","wl.basic"});
        }

        void auth_LoginCompleted(object sender, LoginCompletedEventArgs e)
        {
            if (e.Status == LiveConnectSessionStatus.Connected)
            {
                liveSession = e.Session;
                LiveConnectClient FolderClient = new LiveConnectClient(e.Session);
                FolderClient.GetCompleted += new EventHandler<LiveOperationCompletedEventArgs>(FolderClient_GetCompleted);
                FolderClient.GetAsync("/me/albums");
            }
        }


输入帐号和密码后出现授权确认,点击确认后出错:
Type 'System.Collections.Generic.Queue`1[System.String]' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute.
[解决办法]
Consider marking it with the DataContractAttribute attribute

注意看错误提示
你要声明为可序列化。