How to remove .aspx in url?

I tried the code below in my code behind but doesn't work... I only need to remove it from one page..since this is my only page without a direct link
Private Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs) Dim fullOrigionalpath As String = Request.Url.ToString() If Not fullOrigionalpath.EndsWith(".aspx") Then Context.RewritePath(fullOrigionalpath.Substring(fullOrigionalpath.IndexOf("/", 9)) & ".aspx") End If End Sub