How to browse webpage and download a file at the same time?

Hi

I have a website to let people download file. When I use the code, the user cannot browse another aspx web page during the download of a file and he cannot download multiple files.

How can I fix it?

 
1 System.IO.Stream iStream = null;
2 byte[] buffer = new Byte[10000];
3 int length;
4 long dataToRead;
5 string filename = System.IO.Path.GetFileName(filepath);
6 try
7 {
8 iStream = new System.IO.FileStream(filepath, System. ...