c#查看远程文件是否存在

private bool RemoteFileExists(string fileUrl)///////////////////////////////////查看远程文件是不是存在
    {
        try
        {
            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.CreateDefault(new Uri(fileUrl));
            httpWebRequest.Method = "HEAD";
            httpWebRequest.Timeout = 1000;
            return (((HttpWebResponse)httpWebRequest.GetResponse()).StatusCode == HttpStatusCode.OK);
        }
        catch
        {
            return false;
        }
    }