Proxy on Web Browser in C#

using System;
using System.Windows.Forms;
using SetProxy;

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

        private void button2_Click(object sender, EventArgs e)
        {
            WinInetInterop.SetConnectionProxy(textBox2.Text);
            label4.Text = textBox2.Text;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            webBrowser1.Url = new Uri(textBox1.Text);
        }
    }
}