C#:如何从WebBrowser元素获取文档标题？

using System;
using System.Windows.Forms;

namespace WebBrowserExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            webBrowser1.DocumentCompleted += WebBrowser1_DocumentCompleted;
        }

        private void WebBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            string documentTitle = webBrowser1.DocumentTitle;
            Console.WriteLine("文档标题: " + documentTitle);
        }
    }
}