How can we get the URL of the current page in F #, Websharper

Question

How can we get the URL of the current page in F #, Websharper.

for example, we do it in C #

string PageUrl = Request.Url.ToString ();

It is very simple for experienced people, I just want to get the current URL of the page with the full url request

> e.g. http://localhost:58496/default.aspx?id=434