Recognize URL in plain text

This should be easy, but I’m not sure how to best go about it. I have a WinForms app that lets the user type in long descriptions. Occaisionally, they would type in URLs, and the RichTextBox would recognize them and make them clickable when displayed.

Removing a querystring from url in asp.net

HI, I need to remove a querystring when a user clicks a particular LinkButton.
So for example if the querystring is http://UserProfileManager.com?UserID=1234 …. when the user clicks on the Linkbutton, I want the url to be http://UserProfileManager.com. The issue is that everything is on one page, and I am using asp:panel to show and hide different areas of the webpage.