Send file to client and delete it

I have a word document in my server, that I want to send to my client. Actually I want them to download that file. I am creating that file in runtime, and I want to delete it after they download it from my server. I'm trying this scenario locally. After the creation of file, my server sends it to client. In web browser I see this:

I don't want this. I want web browser to open save file dialog. I want client to download real file. Here is my code :

           Guid temp = Guid.NewGuid();
           string resultFilePath = Server.MapPath("~/formats/sonuc_" + temp.ToString()  + ".doc");
            if (CreateWordDocument(formatPath, resultFilePath , theLst)) {

                Response.TransmitFile(resultFilePath);

                Response.Flush();

                System.IO.File.Delete(resultFilePath);

                Response.End();
            }

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这段代码应该做到这一点，但请注意，这会导致将整个文件加载到服务器的内存中。

private static void DownloadFile(string path)
{
    FileInfo file = new FileInfo(path);
    byte[] fileConent = File.ReadAllBytes(path);

    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", file.Name));
    HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
    HttpContext.Current.Response.ContentType = "application/octet-stream";
    HttpContext.Current.Response.BinaryWrite(fileConent);
    file.Delete();
    HttpContext.Current.Response.End();
}

---

What you want is not an .aspx file (which is a web-page) but an .ashx which can provide the data you need, and set the content-disposition. See this question for an example (here using PDF-downloads):

Downloading files using ASP.NET .ashx modules

You might also try to set the correct content type / mime type for Word, perhaps like the following, or you might take a look at this question.

response.ContentType = "application/msword";
response.AddHeader("Content-Disposition", "attachment;filename="yourFile.doc"");

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