How to check Previous request in Asp.Net 3.5

Feb 22 2011 6:38 AM

How to Check Pervious Page.
I Want to perform action if page request from specific page.

eg.
if(page=="add.aspx"){}
else if(page=="sub.aspx"){}
else (page=="subcat.aspx"){}

Is this Possible ?? OR How I can do this??