using System.Runtime.InteropServices;
//DllImport命名空间的引用
class test //提示音
{
 [DllImport("winmm.dll")]
 public static extern bool PlaySound(String Filename,int Mod,int Flags);
 public void Main()
 {
  PlaySound(@"d:/qm.wav",0,1);
 //把1替换成9，可连续播放
 }
}

System.Media.SystemSounds.Asterisk.Play();
System.Media.SystemSounds.Beep.Play();
System.Media.SystemSounds.Exclamation.Play();
System.Media.SystemSounds.Hand.Play();
System.Media.SystemSounds.Question.Play();

System.Media.SoundPlayer sp = new SoundPlayer();
sp.SoundLocation = @"D:\10sec.wav";
sp.PlayLooping();

using System.Runtime.InteropServices; 
public static uint SND_ASYNC = 0x0001; 
public static uint SND_FILENAME = 0x00020000; 
[DllImport("winmm.dll")] 
public static extern uint mciSendString(string lpstrCommand, 
string lpstrReturnString, uint uReturnLength, uint hWndCallback); 
public void Play() 
{ 
mciSendString(@"close temp_alias", null, 0, 0); 
mciSendString(@"open ""E:\Music\青花瓷.mp3"" alias temp_alias",null,0,0); 
mciSendString("play temp_alias repeat", null, 0, 0); 
}

private void axWindowsMediaPlayer1_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e) 
{ 
 if (axWindowsMediaPlayer1.playState == WMPLib.WMPPlayState.wmppsMediaEnded)
{
Thread thread = new Thread(new ThreadStart(PlayThread));
thread.Start();
} 
} 
private void PlayThread()
{ 
 axWindowsMediaPlayer1.URL = @"E:\Music\SomeOne.avi";
 axWindowsMediaPlayer1.Ctlcontrols.play();
}