Create an ASPX file, called download.aspx . This file takes a filename as a parameter, and returns the contents of that file in the response stream. For example, if you wanted to have the users download a file called xyz .gif residing in the images folder, you would do so like this: "download.aspx?file=/images/xefteri.gif" > Download the Xefteri image This is the vb code for downloading the file "vb" runat= "server" explicit= "true" strict= "true" %> "vb" runat= "server" > Sub Page_Load(Sender As Object, E As EventArgs) Dim strRequest As String = Request.QueryString( "file" ) '-- if something was passed to the file querystring If strRequest "" Then 'get absolute path of the file Dim path As String = Server.MapPath(strRequest) 'get file object as FileInfo Dim file As System.IO.FileInfo = New System.IO.FileInfo(path) '-- if the file exists on the server If file.Exists Then 'set appropriate headers Response.Clear() Response.AddHeader( "Content-Disposition" , "attachment; filename=" & file.Name) Response.AddHeader( "Content-Length" , file.Length.ToString()) Response.ContentType = "application/octet-stream" Response.WriteFile(file.FullName) Response.End 'if file does not exist Else Response.Write( "This file does not exist." ) End If 'nothing in the URL as HTTP GET Else Response.Write( "Please provide a file to download." ) End If End Sub This will work with all the files extension abd aby operating system