im working with custon entry rendered, i need to hear from xaml in my custom render when i clicked my button

i have this code in my xaml

```
<local:MyEntry   eventRefresh="true">

```

when i clicked my button this function is actived

```
private async void Execute(object sender)
        {
    var entry = ((MyEntry)view);
    entry.eventRefresh = "false";

```

but my EntryRendered donot hear the change

```
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
        {
            base.OnElementChanged(e);
            if (Control != null)
            {
                var element = Element as MyEntry;               

```