private void BtnPlayerTest_Click(object sender, RoutedEventArgs e)
        {
            var playerWindow = new PlayerTestWindow {
                Owner = this
            };

            playerWindow.Show();
        }
 private void BtnPlayerTest_Click(object sender, RoutedEventArgs e)
 {
     var playerWindow = new PlayerTestWindow { Owner = this };
     playerWindow.Show();
 }