title: When to use Request.UrlReferrer and when Request.ServerVariables["HTTP_REFERER"]?
body: <p>Both returns the incoming url, Just to know When to use <code>Request.UrlReferrer</code> and when <code>Request.ServerVariables["HTTP_REFERER"]</code> and why?</p>
  
  <p>Currently, in one of my application Urlreferrer is working in my local machine but its not working when went live?</p>
  
  <p>Additionally, its most appreciable if anyone can guide any alternative of both Urlreferrer and HTTP_REFERRER?</p>