Using System.Media.SoundPlayer；

OpenFileDialog o = new OpenFileDialog();
o.ShowDialog();
SoundPlayer player = new SoundPlayer(o.FileName);
player.Play();//這個方法只播放一遍
player.PlayLooping();//這個方法迴圈播放 

o.FileName此處可以直接指定音樂檔案路徑 




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利用.NET自帶的類庫SoundPlayer來播放音樂，此類在System.Media
 
名稱空間中，支援同步和非同步播放，也支援檔案和流播放。
同步播放： 

System.Media.SoundPlayer player = new System.Media.SoundPlayer();
player.SoundLocation = @"d:\music\happy.mp3";
player.Load();
player.Play();

非同步播放： 
System.Media.SoundPlayer player = new System.Media.SoundPlayer();
player.SoundLocation = @"d:\music\happy.mp3";
player.LoadAsync
 
();
player.PlaySync();

迴圈播放： 

System.Media.SoundPlayer player = new System.Media.SoundPlayer();
player.SoundLocation = @"d:\music\happy.mp3";
player.Load();
player.PlayLooping();