public partial class Timer : Form
{
    private NotifyIcon ni;

    public Timer()
    {
        InitializeComponent();

        // 实例化图标组件
        this.ni = new NotifyIcon();
        this.ni.Icon = 指定托盘区图标;
        this.ni.Visible = true;
        // 设置窗体样式
        this.WindowState = FormWindowState.Minimized;
        this.ShowInTaskbar = false;
    }

    protected override void OnShown(EventArgs e)
    {
        base.OnShown(e);
        // 设置隐藏
        this.Visible = false;
    }
}

------解决方案--------------------
this.Hide();

------解决方案--------------------
当前窗体.Hide()就可以啊

------解决方案--------------------
在窗体的构造函数里面写
this.ShowInTaskbar = false;
this.FormBorderStyle = FormBorderStyle.None;

------解决方案--------------------
探讨

引用:

窗体实例名.hide()

不要用Timer，和System.Threading.Timer不容易区分


C# code

   static void Main()
        {
            MyMainForm = new MainForm();
            Application.Run(MyMainForm)……


------解决方案--------------------
this.hide()

------解决方案--------------------
C# code

protected override void OnShown(EventArgs e)
        {
            base.OnShown(e);
            this.Visible = false;
        }