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private void button1_Click(object sender, EventArgs e)
{
BackgroundWorker bw = new BackgroundWorker();
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.RunWorkerAsync();
}
void bw_DoWork(object sender, DoWorkEventArgs e)
{
//throw new NotImplementedException();
SoundPlayer sp = new SoundPlayer(@"d:\1.wav");
sp.Play();
}