public void PauseSongTest()
        {
            var playControlViewModel = new PlayControlViewModel();

            Assert.IsFalse(playControlViewModel.IsPlay);
            playControlViewModel.PauseSong();
            Assert.IsFalse(playControlViewModel.IsPlay);
            playControlViewModel.IsPlay = true;
            Assert.IsTrue(playControlViewModel.IsPlay);
        }
 private void timeSlider_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
 {
     playControlViewModel.PauseSong();
 }