title: Get address of the page from which redirected to new page
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/3805438/get-previous-page-url-after-response-redirect">Get previous page URL after Response.Redirect</a>  </p>
  </blockquote>
  
  
  
  <p>Suppose in page 1.aspx, if error occurs, I'm using in catch() block:</p>
  
  <pre><code>Response.Redirect("err.aspx");
  </code></pre>
  
  <p>In code behind of err.aspx, I need url of 1.aspx (or any page from which I'm redirecting to err.aspx page). How do I achieve this?</p>