Just Add COM component from add refference.
This is dll name
WMPLib its also known as Window media Player
and the code is....
using WMPLib;
using System.Media;
WMPLib.WindowsMediaPlayer wplayer = new WMPLib.WindowsMediaPlayer();
wplayer.URL = "C:\\File Name\\Song.mp3";
wplayer.controls.play();
This will work sure........
Dharmendra Rai,
Ghaziabad,
India