Reading and saving an image from url

Hi,


I would like to be able to read an image based on a url hosted elsewhere.  To be clear, this is a legitimate service that is provided and they do allow caching of data, so I'm not trying to steal someone elses data.
So far I have the following code:


public static byte[] GetBytesFromUrl(string url)
    {
        byte[] bytes;
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        WebResponse resp = req.GetResponse();

        Stream stream = resp.GetResponseStream();
        using (BinaryReader br = new BinaryReader(stream))
        {
            bytes = br.ReadBytes(500000);
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