C# HtmlElement InvokeMember Redirect

So I have a method that is using the following process to submit a button on a webpage:

HtmlElement form = br.Document.GetElementById("submit");
form.InvokeMember("submit");

When that button is submitted, the button is redirected to a new page. Is there any way to grab the link of this redirected page as the link changes every time the button is submitted?