WebBrowser

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _2_WebBrowser
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string text = textBox1.Text;
            Uri uri;
            if (!text.Contains("http://"))
            {
                uri = new Uri("http://" + text);
            }
            else
                uri = new Uri(text);

            
            webBrowser1.Url = uri;
        }
    }
}

　重要的属性是URI