如何让代码在Response.end之后执行

我的代码是这样的

HttpContext.Current.Response.Clear();
     HttpContext.Current.Response.ContentType = "application/pdf";
     HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + "name" + ".pdf");
     HttpContext.Current.Response.TransmitFile("~/media/pdf/name.pdf");
     HttpContext.Current.Response.End();
     if (FileExists("/media/pdf/name.pdf"))
     {
         System.IO.File.Delete("D:/Projects/09-05-2013/httpdocs/media/pdf/name.pdf");
     }

这里我想在浏览器中下载name.pdf，下载后我想删除该文件。但是代码执行停止于

HttpContext.Current.Response.End();

该行执行后没有任何代码。所以我的删除功能不起作用。这个问题有什么解决办法吗？

// Add headers for a csv file or whatever
Response.ContentType = "text/csv"
Response.AddHeader("Content-Disposition", "attachment;filename=report.csv")
Response.AddHeader("Pragma", "no-cache")
Response.AddHeader("Cache-Control", "no-cache")

// Write the data as binary from a unicode string
Dim buffer As Byte()
buffer = System.Text.Encoding.Unicode.GetBytes(csv)
Response.BinaryWrite(buffer)

// Sends the response buffer
Response.Flush()

// Prevents any other content from being sent to the browser
Response.SuppressContent = True

// Directs the thread to finish, bypassing additional processing
HttpContext.Current.ApplicationInstance.CompleteRequest()