private void Button_Click_1(object sender, RoutedEventArgs e) { if (!(textBoxOpenVideo.Text == "VideoFile" && textBoxOpenSrt.Text == "SubtitleFile")) { Video.Source = new Uri(textBoxOpenVideo.Text); MediaControl.InitStaticVar(); InitDispatcherTimer(); InitSubtitle(); InitTask(); Video.ScrubbingEnabled = true; Video.Pause(); gridMenu.Opacity = 0; gridPlayer.Opacity = 1; } else { textBoxOpenVideo.BorderBrush = Brushes.Red; textBoxOpenSrt.BorderBrush = Brushes.Red; } }