最小化或关闭时隐藏到系统托盘

  首先，添加托盘控件，在vs工具箱里直接把notifyIcon拖到主界面即可

  其次、进行一系列的操作，比如双击打开，退出等

  

        /// <summary>
        /// 显示托盘图标
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void mainform_Resize(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)    //最小化到系统托盘
            {
                notifyIcon1.Visible = true;    //显示托盘图标 
                this.Hide();    //隐藏窗口
              
            }
        }
        /// <summary>
        /// 显示主界面
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            notifyIcon1.Visible = false;
            this.Show();
            WindowState = FormWindowState.Normal;
            this.Focus();
        }
        /// <summary>
        /// 退出托盘
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        /// <summary>
        /// 显示主界面
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 显示主界面ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            notifyIcon1_MouseDoubleClick(null, null);
        }
        /// <summary>
        /// 关闭隐藏到托盘
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void mainform_FormClosing(object sender, FormClosingEventArgs e)
        {

            //注意判断关闭事件Reason来源于窗体按钮，否则用菜单退出时无法退出!
            if (e.CloseReason == CloseReason.UserClosing)
            {
                e.Cancel = true;    //取消"关闭窗口"事件
                this.WindowState = FormWindowState.Minimized;    //使关闭时窗口向右下角缩小的效果
                notifyIcon1.Visible = true;
                this.Hide();
                return;
            }

        }

在托盘右击时间中添加"显示主界面"，"退出"等