public async void AddEntity(object sender, RoutedEventArgs e)
{
SelectedItem.Id = Guid.NewGuid();
SelectedItem.Name = TextName.Text;
SelectedItem.Surname = TextSurname.Text;
SelectedItem.DateOfBirth = DateTime.Parse(TextDeteOfBirth.Text);
SelectedItem.Experience = TimeSpan.Parse(TextExperience.Text);
await _pilotService.CreateEntityAsync(SelectedItem);
AddButton.Visibility = Visibility.Collapsed;
TextId.IsReadOnly = false;
await ReloadEntitiesAsync();
}