void OnClick(object sender, System.EventArgs e)
{
var page = new TargetPage();
//page.SliderValueChanged += OnSliderValueChanged;
MessagingCenter.Subscribe <TargetPage, double>(this, Events.SliderValueChanged, OnSliderValueChanged);
Navigation.PushAsync(page);
MessagingCenter.Unsubscribe <MessagingCenter>(this, "SliderValueChanged");
}
private void OnsliderValueChanged(TargetPage source, double newValue)
{
label.Text = newValue.ToString();
}
