string URL = "entail.eu/client-files/";
WebClient WC = new WebClient();
        string HTML = WC.DownloadString(URL);
        MatchCollection M = Regex.Matches(HTML, "<A HREF=".*">(.*)</A>");
        foreach (Match Match in M) {
            RichTextBox_Log.AppendText("Name : " + Match.Groups[1] + " | Link : /client-files/" + Match.Groups[1] + "n");
        }