1.拉出一個notifyIcon1到使用者介面，也可以NEW一個

2.拉出一個ContextMenuStrip控制元件，命名為mymenu,集合中增加退出

3.notifyIcon1的屬性ContextMenuStrip 增加 myMenu;或者this.notifyIcon1.ContextMenuStrip = myMenu;

        private void FrmMain_Load(object sender, EventArgs e)
        {

            //最小化到托盤
           // this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
           // notifyIcon1.Icon = new Icon("2221.ico");//指定一個圖示      
            notifyIcon1.Visible = false;
            notifyIcon1.DoubleClick += new System.EventHandler(this.notifyIcon1_DoubleClick);
            this.SizeChanged += new System.EventHandler(this.FrmMain_SizeChanged);

        }
 

        /// <summary>
        /// 窗體大小改變事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrmMain_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)//最小化      
            {
                this.ShowInTaskbar = false;
                this.notifyIcon1.Visible = true;
            }
        }
        /// <summary>
        /// 關閉窗體事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            DialogResult result = MessageBox.Show("是否退出？選否,最小化到托盤", "操作提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
            if (result == DialogResult.Yes)
            {

                this.Dispose();
                Application.Exit();
            }
            else
            {
                e.Cancel = true;
                this.WindowState = FormWindowState.Minimized;
                this.Visible = false;
                this.notifyIcon1.Visible = true;
            }

        }
        /// <summary>
        /// 最小化圖示滑鼠事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void notifyIcon1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                myMenu.Show();
            }
        }
        /// <summary>
        /// 退出事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {

            this.Dispose();
            Application.Exit();
        }
 

效果