C＃下载并删除文件

Question

  

可能重复：
  When can I delete a file after using it in Response.WriteFile()?

我正在使用以下代码下载临时文件然后将其删除但是，最后一条语句没有被执行，我该怎么办呢

Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + sFileName);
Response.Clear();
Response.WriteFile(sFilePath);
//Response.WriteFile(Server.MapPath(sFilePath));            
Response.End();
File.Delete(sFilePath);