private void Mediaplayer_KeyDown(object sender, KeyPressEventArgs e)
        {
            if (e.KeyCode == Keys.MediaPlayPause)
            {
                button1_Click(sender, e);
            }
            if (e.KeyCode == Keys.MediaStop)
            {
                StopMediaFile();
            }
            if (e.KeyCode == Keys.VolumeMute)
            {
                trackBar1.Value = 0;
            }
        }

private void Mediaplayer_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {

                case Keys.MediaNextTrack:
                    {

                        break;
                    }
                  
                case Keys.MediaPlayPause:
                    {

                        startMediaFile(root, audioFiles, "mp3");
                        break;
                    }
                    
                case Keys.MediaPreviousTrack:
                    {
                        break;
                    }
     
                case Keys.MediaStop:
                    {
                        StopMediaFile();
                        break;
                    }
                  
            }
        }