In my Xamarin app, there is a button, which I want to make visible after 5 seconds.

I tried `Device.StartTimer`, but it make button appears after 5 seconds, and then after 5 seconds later hide it and then after 5 seconds make it appears again (forever).

```
Device.StartTimer(TimeSpan.FromSeconds(5), () =>
{
    // Button

    return true;
});

```

How can I make button appears after 5 seconds, and it never disappears?