public void AtualizarServicos()
{
if (Servicos == null)
{
Servicos = new ObservableCollection <Servico>(DataStore.GetAll().OrderBy(s => s.Nome));
}
else
{
Servicos = new ObservableCollection <Servico>(Servicos.OrderBy(s => s.Nome));
}
OnPropertyChanged(nameof(Servicos));
}
