Use different IP addresses in C# browser control

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C#

.NET

IP

controls

browser

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I'm trying to develop an application, where user can load a proxy list and software should navigate to a page with different IP's. I'm using some registry settings to do that. But the problem is that when i try to change the IP address it remains the same, in "Internet Options" the IP has changed but on the web page which i'm navigating to, is still shown the IP I navigated first time with. Any solutions about that? or maybe, You have a better solution about this situation. Please suggest something. I tried "httprequest" some moments ago, but that was maddeningly unhelpful. Or maybe i did "httprequest" in a bad way. Any suggestions?

What I have tried:

private void BrowseProxy_Click(object sender, EventArgs e)  
     {
        openFileDialog1.ShowDialog();

        ProxySrcTBX.Text = openFileDialog1.FileName;

        using (StreamReader r = new StreamReader(ProxySrcTBX.Text))
        {
            string line;
            while ((line = r.ReadLine()) != null)
            {
                ProxyCount++;
            }
            r.Close();
        }

        try { Proxy = File.ReadAllLines(ProxySrcTBX.Text); }
        catch (Exception Exception) { MessageBox.Show(Exception.ToString()); }
    }

   private void SetProxy(string Proxy)
    {
        string key = "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings";

        RegistryKey RegKey = Registry.CurrentUser.OpenSubKey(key, true);
        RegKey.SetValue("ProxyServer", Proxy);
        RegKey.SetValue("ProxyEnable", 1);
        RegKey.Close();

    }

  private void button6_Click(object sender, EventArgs e)
    {
        webBrowser1.ScriptErrorsSuppressed = true;
        SetProxy(Proxy[ProxyIndex]);
        label2.Text = Proxy[ProxyIndex];
        currentUri = new Uri("https://myip.ru");
        NavigateTo(currentUri);
    }
    public void NavigateTo(Uri url)
    {
        url = currentUri;
        webBrowser1.Navigate(url);
    }

   private void Dispose_Click(object sender, EventArgs e)
    {
        SetProxy("");
        string key = "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings";
        RegistryKey RegKey = Registry.CurrentUser.OpenSubKey(key, true);
        RegKey.SetValue("ProxyEnable", 0);
        RegKey.Close();
        ProxyIndex++;
    }