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;