_Context = new SP.ClientContext
            (SP.ApplicationContext.Current.Url);

        _Context.Load(_Context.Web);
        _Context.Load(_Context.Web.CurrentUser);
        _Context.Load(_Context.Web.SiteGroups);

        _MemberGroup = _Context.Web.AssociatedMemberGroup;
        _MemberUserCollectionInGroup = _MemberGroup.Users;
        _Context.Load(_MemberUserCollectionInGroup);

        _VisitorGroup = _Context.Web.AssociatedVisitorGroup;
        _VisitorUserCollectionInGroup = _VisitorGroup.Users;
        _Context.Load(_VisitorUserCollectionInGroup);

        //_Context.Load(_Context.Web, website => website.Title);
        _Context.ExecuteQueryAsync(OnConnectSucceeded, OnConnectFailed);