我在用vs2010写一个mp3的播放器，想在listbox中的歌曲列表实现双击播放，请问怎么实现？？

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void 添加ToolStripMenuItem_Click(object sender, EventArgs e)
        {
             OpenFileDialog of = new OpenFileDialog();
            of.Multiselect = true;
            of.Filter = "音频文件(*.wav;*.snd;*.au;*.aif;*.aifc;*.aiff;*.wma;*.mp3)|*.wav;*.snd;*.au;*.aif;*.aifc;*.aiff;*.wma;*.mp3";
            if (of.ShowDialog() == DialogResult.OK)
            {
                foreach (string filename in of.FileNames)
                    this.axWindowsMediaPlayer1.currentPlaylist.insertItem(
                        this.axWindowsMediaPlayer1.currentPlaylist.count,
                        this.axWindowsMediaPlayer1.newMedia(filename));
                listBox1.Items.AddRange(of.SafeFileNames);
            }
        }

      

        private void 全部移除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (listBox1.Items.Count > 0)
            {
               axWindowsMediaPlayer1.Ctlcontrols.stop();
                listBox1.Items.Clear();
              axWindowsMediaPlayer1.currentPlaylist.clear();
            }
        }

        private void 单项移除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            
            if (listBox1.Items.Count > 0)
            {
                int index = listBox1.SelectedIndex;
                axWindowsMediaPlayer1.currentPlaylist.removeItem(
                  axWindowsMediaPlayer1.currentPlaylist.get_Item(index));
                listBox1.Items.RemoveAt(index);
            }
        
        }
        private void ListBox1_DoubleClick(object sender, EventArgs e)
        {
         
        }


这是代码

帮忙写一哈listbox1_DoubleClick的实现