获取文件内容

示例代码：

        Uri uri = new Uri("ftp://ftp.microsoft.com/SoftLib/Readme.txt");
        if (uri.Scheme == Uri.UriSchemeFtp)
        {
            FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(uri);
            request.Method = WebRequestMethods.Ftp.DownloadFile;
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string tmp = reader.ReadToEnd();
            Panel1.GroupingText = tmp;