check if url is valid and accessible .NET

This is a common problem for most of ASP.NET developer when we try to check if the url is valid or not. Here is a tip for you. :)

public static bool IsValidUrl(string url)
{
HttpWebRequest httpReq =
(HttpWebRequest)WebRequest.Create(url);
httpReq.AllowAutoRedirect =
false;
httpReq.Method = "HEAD";
httpReq.KeepAlive =
false;
httpReq.Timeout = 2000;
HttpWebResponse httpRes;
bool exists =
false;
try
{
httpRes = (HttpWebResponse)httpReq.GetResponse();
if
(httpRes.StatusCode == HttpStatusCode.OK)
{
exists =
true;
}
}
catch (Exception ex)
{
}
return exists;
}