string soundfile1 = @"C:\001.wav";
var sound1 = new System.Media.SoundPlayer(soundfile1);
sound1.Play();
string soundfile2 = @"C:\002.wav";
var sound2 = new System.Media.SoundPlayer(soundfile2);
sound2.Play();
using System.Media;
SoundPlayer player = new SoundPlayer(@"C:\001.wav");
player.PlaySync();
player = new SoundPlayer(@"C:\002.wav");
player.PlaySync();