How to check if System.Net.WebClient.DownloadData is downloading a binary file?

Question

I am trying to use WebClient to download a file from web using a WinForms application. However, I really only want to download HTML file. Any other type I will

Answer 1

I'm not sure the cause, but perhaps you hadn't downloaded anything yet. This is the lazy way to get the content type of a remote file/page (I haven't checked if this is efficient on the wire. For all I know, it may download huge chunks of content)

        Stream connection = new MemoryStream(""); // Just a placeholder
        WebClient wc = new WebClient();
        string contentType;
        try
        {
            connection = wc.OpenRead(current.Url);
            contentType = wc.ResponseHeaders["content-type"];
        }
        catch (Exception)
        {
            // 404 or what have you
        }
        finally
        {
            connection.Close();
        }