ASP.NET直接下载一个文件，而不是在IE中打开它

FileStream fileStream=new FileStream(pFileName,FileMode.Open)
long fileSize = fileStream.Length;
Context.Response.ContentType="application/octet-stream";
Context.Response.AddHeader("Content-Disposition","attachment; filename=\"" + fileName + "\";");
Context.Response.AddHeader("Content-Length",fileSize.ToString());
byte[] fileBuffer=new byte[fileSize];
fileStream.Read(fileBuffer, 0, (int)fileSize);
Context.Response.BinaryWrite(fileBuffer);
Context.Response.End();