網(wǎng)上有很多將Winform窗體縮到 System tray的示例, 但多數(shù)不好用.
這里是一個簡單示例, 使用了Visual studio自帶的 NotifyIcon 控件和一個快捷菜單 contextMenuStrip控件.

增加一個 contextMenuStrip 控件, 新增兩個菜單項: 顯示界面和退出系統(tǒng).
增加一個 NotifyIcon 控件, 設置它的圖標, 并綁定上面的菜單組件.

C#代碼示例:

public partial class Form1 : Form
{
private readonly string APPLICATION_NAME = "我的程序";
private bool appShouldClose = false;

public Form1()
{
    InitializeComponent();
}

/// <summary>
/// 恢復顯示主界面
/// </summary>
private void showUI()
{
    this.Show();
    this.WindowState = FormWindowState.Normal;
    notifyIcon1.Visible = false;
}

/// <summary>
/// trayIcon 雙擊鼠標用來顯示主界面
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
    showUI();
}

/// <summary>
/// trayIcon 的快捷菜單項[顯示主界面]的處理函數(shù)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void toolStripMenuItemOpen_Click(object sender, EventArgs e)
{
    showUI();
}

/// <summary>
/// trayIcon 的快捷菜單項[退出系統(tǒng)]的處理函數(shù)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void toolStripMenuItemExit_Click(object sender, EventArgs e)
{
    var result = MessageBox.Show("請確認是否要退出系統(tǒng)?", "請確認", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
    if (result == DialogResult.Yes)
    {
        appShouldClose = true;
        this.Close();
    }
}

/// <summary>
/// 縮小窗體到 sys tray
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    if (appShouldClose)
    {
        //nothing
    }
    else if (e.CloseReason == CloseReason.UserClosing)
    {
        e.Cancel = true;
        this.WindowState = FormWindowState.Minimized;
        this.Hide();
        notifyIcon1.Visible = true;
        notifyIcon1.ShowBalloonTip(1000, APPLICATION_NAME, "已最小化到系統(tǒng)托盤", ToolTipIcon.Info);
    }
}
}