Is there a way to capture the last landing page's HTTP response/HTML in .NET?

This is what happens:

1. Use HttpClient to POST www.website.com/login
2. /login responds with a new location
3. App JavaScript handles the new location by using window.location = www.website.com/newLocation
4. I want to capture the response where it was redirected to

When I use HttpClient, it is only able to capture the new location in Step 2 and it will not capture anything further after that.

Is there a way to capture HTTP response in Step 4? I'm specifically after the HTML code that is passed back to the browser.