How to detect browsing using the WebBrowser class and capture information with C #

Hello, I'm doing an integration with the Free Market API, where I need to open a browser-based page with the page to allow the user to access the API of my application (confirm documentation here ). To do this, I intend to take advantage of the System.Windows.Forms.WebBrowser class that opens Internet Explorer on the page I need.

By the class metadata, I can use event Navigated by passing a method that would allow me to check from the browser URL if the page I passed as redirect_url is the one that was called (so I can get the token authentication):

public class Test
{
    public void requestCode()
    {
        var clientId = 123;                // algum clientId
        var redUrl = "https://www.foo.com" // minha url de redirect
        var url =
            $"https://auth.mercadolivre.com.br/authorization?"+
            $"response_type=code&" +
            $"client_id={clientId}&"+
            $"redirect_uri={redUrl}";
        try
        {
            using (var browser = new WebBrowser())
            {
                browser.Navigated += 
                    new WebBrowserNavigatedEventHandler(
                        requestAuthorizeOnNavigated
                    );
                browser.Navigate(url, Guid.NewGuid().ToString());
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
    public void requestAuthorizeOnNavigated(
        object sender, 
        WebBrowserNavigatedEventArgs e
    )
    {
        Console.Write(sender.ToString(), e.ToString());
    }
}

When I run my code, I can open the free market page that generates the token (or that prompts the user to authorize it initially). The problem is that I am not able to detect the navigation, even declaring the event within the using ...

What do I need to do to be able to detect the navigation (and read the URI that was informed in the last navigation) from this example?