public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    view = inflater.Inflate(Resource.Layout.fragment_conexao, container, false);

    Task.Run(async () => {
        while (true)
        {
            await Task.Delay(3000).ContinueWith(t => StartAsyncTimedWorkAsync());
        }
    });

    return view;
}

private async Task StartAsyncTimedWorkAsync()
{
    textView.Text = "Nova palavra...";
}