无法将'System.EventArgs‘类型的对象强制转换为'System.Windows.Forms.FormClosingEventArgs’类型

using System;
using System.Windows.Forms;

public class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        this.FormClosing += new FormClosingEventHandler(Form1_FormClosing);
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (e is FormClosingEventArgs formClosingArgs)
        {
            // 现在可以安全地使用 formClosingArgs
            bool cancel = formClosingArgs.Cancel;
            if (MessageBox.Show("Are you sure you want to close the form?", "Close Confirmation", MessageBoxButtons.YesNo) == DialogResult.No)
            {
                formClosingArgs.Cancel = true;
            }
        }
    }

    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Form1());
    }
}