private async void btnEdit_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                AusterityWindow window = new AusterityWindow(_context, SelectedAusterity);
                window.Show();

                if (window.DataChanged)
                {
                    await UpdateAusterities();
                }
            }catch { }
        }
        private void btnNew_Click(object sender, RoutedEventArgs e)
        {
            AusterityWindow window = new AusterityWindow(_context);

            window.ShowDialog();
        }