WindowsMediaPlayer wmp = new WindowsMediaPlayer();
            wmp.URL = "music.mp3";
            wmp.controls.play();

WindowsMediaPlayer wmp = new WindowsMediaPlayer();
        Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("PostGen.Resources.Kalimba.mp3");
        using (Stream output = new FileStream ("C:\temp.mp3", FileMode.Create))
        {
            byte[] buffer = new byte[32*1024];
            int read;

            while ( (read= stream.Read(buffer, 0, buffer.Length)) > 0)
            {
                output.Write(buffer, 0, read);
            }
        }
        wmp.URL = "C:\temp.mp3";
        wmp.controls.play();

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        File.Delete("C:\temp.mp3");
    }

using (Stream output = new FileStream("C:\temp.mp3", FileMode.Create))
        {
            output.Write(Properties.Resources.notification_mp3, 0, Properties.Resources.notification_mp3.Length);
        }
        WindowsMediaPlayer wmp = new WindowsMediaPlayer();
        wmp.URL = "C:\temp.mp3";
        wmp.controls.play();