how can i upload a swf file into website using asp.net c# language?

Hi Jaheena,
You can upload the swf file in the same as you upload other text or any other file by using FileUploasd control for ex:
if (FileUpload1.HasFile)
{
FileUpload1.SaveAs(Server.MapPath("~\\Images\\" + FileUpload1.FileName));
}