What are you wanting to do? Embed the swf in the webpage or download the swf? If you want to embed the swf, just use the standard object/embed tags. http://www.alistapart.com/articles/flashsatay/[^] details a method embedding swf using XHTML Strict. If you are trying to download the swf, then will you need to change the mime-type of the swf to application/octet-stream
<%@ Page Language="VB" %>
Sub Page_Load(sender as Object,e as EventArgs)
Dim fileName as String="/test.swf";
Response.ContentType="application/octet-stream"
Response.AddHeader("Content-Disposition","filename="&fileName)
Response.WriteFile(Server.MapPath(fileName))
End Sub