在窗体上拖一个ContextMenuStrip控件，然后

private void notifyIcon1_MouseClick(object sender, MouseEventArgs e)        {            if (e.Button == System.Windows.Forms.MouseButtons.Right)             {                this.contextMenuStrip1.Show(MousePosition.X, MousePosition.Y - this.contextMenuStrip1.Size.Height);            }        }        private void LookToolStripMenuItem_Click(object sender, EventArgs e)        {            this.ShowInTaskbar = true;            this.Visible = true;            this.WindowState = FormWindowState.Normal;            this.notifyIcon1.Visible = false;        }        private void toolStripMenuItem1_Click(object sender, EventArgs e)        {            Application.Exit();        }