I have been googling for hours and trying to figure this out, and I just can\'t. I have 1 webbrowser control on a form, webbrowser1.
Once I load a page, say google.
You could try adding a random number or guid in the url as a parameter. Such as:
var url = "http://google.com"; webBrowser.Navigate(url + "?refreshToken=" + Guid.NewGuid().ToString());
It's not elegant, but it works. Hope it helps.