File Download From Asp.net C#

 string strURL = “URL”;

 string FileName = string.Empty;

 FileName = strURL.Substring(strURL.LastIndexOf('/') + 1);

 WebClient req = new WebClient();

 HttpResponse response = HttpContext.Current.Response;

 response.Clear();

 response.ClearContent();

 response.ClearHeaders();

 response.Buffer = true;

 response.AddHeader("Content-Disposition", "attachment;filename=\"" + FileName + "\"");

 byte[] data = req.DownloadData(Server.MapPath(strURL));

 response.BinaryWrite(data);

 response.End();