同步播放：
System.Media.SoundPlayer player = new System.Media.SoundPlayer(); player.SoundLocation = @"d:/music/happy.wav"; player.Load(); player.Play();
异步播放：
System.Media.SoundPlayer player = new System.Media.SoundPlayer(); player.SoundLocation = @"d:/music/happy.wav"; player.LoadAsync(); player.PlaySync();
循环播放：
System.Media.SoundPlayer player = new System.Media.SoundPlayer(); player.SoundLocation = @"d:/music/happy.wav"; player.Load(); player.PlayLooping();