Using Uploaded Files As Attachment By E-mail?

my question is related to this topic :

http://forums.asp.net/p/1626458/4186694.aspx#4186694
I added another fileUpload in the Sending E-mail Method as following:
if (FileUpload1.HasFile && FileUpload2.HasFile)
{
FileUpload2.SaveAs(Server.MapPath("NewFolder1") +
"/" + User.Identity.Name.Substring(7) +
"FB.gif");
FileUpload2.SaveAs(Server.MapPath("NewFolder1") +
"/" + User.Identity.Name.Substring(7) +
"SP.gif");
"How can I use these two files that uploaded (Server.MapPath("NewFolder1")
) as attachments in the Attachment Method??"
I tried with this code:

message.Attachments.Add(new System.Net.Mail.Attachment(Server.MapPath("NewFolder1")));