托盘程序导致无法注销或关机

解决办法：在MainForm中重写Windows消息处理方法

示例：

using System;using System.Windows.Forms;using Microsoft.Win32;namespace WindowsFormsApplication1{    public partial class MainForm : Form    {        private const UInt32 WM_ENDSESSION = 0x0016;        public MainForm()        {            InitializeComponent();        }        protected override void WndProc(ref Message message)        {            if (WM_ENDSESSION == message.Msg)            {                Application.Exit();            }            base.WndProc(ref message);        }    }}