C#判断链接图片是否存在

private bool CheckUrlFileExist(string fileurl)
    {
        HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(fileurl);
        try
        {
            HttpWebResponse myRes = (HttpWebResponse)myReq.GetResponse();
            return myRes.ContentLength > 0;
        }
        catch
        { return false; }
    }