http_referer question

[thechasboi]

I need to check the referer. I do this but in one case ther is no referer. How in the world do I tell if the http_referer is empty or null or not?
HttpContext.Current.Request.ServerVariables("HTTP_REFERER")<>"" or something like this cause this is not working.
Thanks for the reply

[thechasboi]

i used String.IsNullOrEmpty(HttpContext.Current.Request.ServerVariables("HTTP_REFERER")) which solved my issue. Thanks for looking at the post any way.