private async void CreateWorker(object sender, EventArgs e)
{
Worker worker = new Worker();
WorkerPage workerPage = new WorkerPage();
workerPage.BindingContext = worker;
await Navigation.PushAsync(workerPage);
}
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
Worker selectedWorker = (Worker)e.SelectedItem;
WorkerPage workerPage = new WorkerPage();
workerPage.BindingContext = selectedWorker;
await Navigation.PushAsync(workerPage);
}