private void Row_DoubleClick(object sender, MouseButtonEventArgs e)
{
PaymentsWindow w = new PaymentsWindow(LoggedUser, (Payment)(sender as DataGridRow).Item);
w.ShowDialog();
btnGet_Click(this, null);
}
private void btnPayments_Click(object sender, RoutedEventArgs e)
{
Visibility = Visibility.Hidden;
PaymentsWindow w = new PaymentsWindow(LoggedUser);
w.ShowDialog();
Visibility = Visibility.Visible;
}