private void btnTestZBledow_Click(object sender, RoutedEventArgs e) { if (bledy.Count != 0) { TEST test = new TEST(bazaBledow, window); test.Left = window.Left + this.Width / 13 + 2; test.Top = window.Top + this.Height / 6; test.Show(); window.Visibility = Visibility.Collapsed; } else { MessageBox.Show("Brak błędów"); } }