title: If a page 'A' is opened, find out from which source page page 'A' has been called?
body: <p>I am currently in "pageA.aspx". Using <code>top.location.href</code> or <code>Response.Redirect()</code>, I've come to "pageB.aspx". How to find out that which page has called "pageB.aspx". Is it "pageA.apsx" or any other page.</p>
  
  <p>I aware of using URL Query-String. But I need to use any other option.</p>