c#：nancy框架下載文件（response.AsAttachment）

環境：

.netframework4.6.1

nancy2.0.0

代碼如下：

Get("/DownloadPdf", paras =>
{
	var filepath = "d:\\test.txt";
	var fileInfo = new FileInfo(filepath);
	var response = new Response();
	response.Contents = (stream) =>
	  {
		  using (var fs = new FileStream(filepath, FileMode.Open))
		  {
			  fs.CopyTo(stream);
		  }
	  };
	return response.AsAttachment(HttpUtility.UrlEncode(fileInfo.Name, Encoding.UTF8), "application/octet-stream");
});