how to get rewritten url after url rewriting

I have a page default.aspx inside display folder :

i use url-rewriting given below :

<rewrite url="~/comment/(.+)" to="~/files/default.aspx?section=$1" />

In my code behind i want to get re-writting path but when i m using 

path = Request.Url.ToString();

It is fetching original path  like abc.com/files/default.aspx?section='asr'

I want to get

abc.com/comment/asr