How to download a file from server

public void downloadXlFile(string url, string filePath)
       {
           if (File.Exists(filePath))
           {
               File.Delete(filePath);
           }
           //Downloading file form Http Url
           WebClient myWebClient = new WebClient();
           myWebClient.DownloadFile(url, filePath);
           //CompleteDownloading file form Http Url
       }

Response.ContentType = "image/jpeg";
        Response.AppendHeader("Content-Disposition", "attachment; filename=Image.xml");
        Response.TransmitFile(Server.MapPath("XML/Image.xml"));
        Response.End();