C#:在系统托盘中使用NotifyIcon显示程序->无法添加上下文菜单”

要在系统托盘中使用NotifyIcon并添加上下文菜单，需要使用ContextMenuStrip。首先，在Form的Load事件中创建ContextMenu，并向其添加条目。接下来，创建NotifyIcon并将其ContextMenu属性设置为新创建的ContextMenu。同时，设置NotifyIcon的Text、Icon和Visible属性。最后，在NotifyIcon的MouseClick事件中检查右键单击，并显示ContextMenu。

下面是示例代码：

public class MyForm : Form
{
    private NotifyIcon notifyIcon;
    private ContextMenuStrip contextMenuStrip;

    public MyForm()
    {
        InitializeComponent();
        
        // 创建ContextMenu
        contextMenuStrip = new ContextMenuStrip();
        contextMenuStrip.Items.Add("Item 1");
        contextMenuStrip.Items.Add("Item 2");
        contextMenuStrip.ItemClicked += new ToolStripItemClickedEventHandler(contextMenuStrip_ItemClicked);

        // 创建NotifyIcon
        notifyIcon = new NotifyIcon();
        notifyIcon.Text = "My App";
        notifyIcon.Icon = new Icon("myIcon.ico");
        notifyIcon.Visible = true;
        notifyIcon.ContextMenuStrip = contextMenuStrip;
        notifyIcon.MouseClick += new MouseEventHandler(notifyIcon_MouseClick);
    }

    private void notifyIcon_MouseClick(object sender, MouseEventArgs e)
    {
        // 检查是否右键单击
        if (e.Button == MouseButtons.Right)
        {
            contextMenuStrip.Show(Control.MousePosition);
        }
    }

    private void contextMenuStrip_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
    {
        // 处理用户单击菜单项的事件
        MessageBox.Show(e.ClickedItem.Text);
    }
}