Image replace or rename and store in a folder in asp.net using file upload control

int latestid = ct.TheaterID;
                cu.updateUserInfoByEmail(txtemail.Text, latestid);
                if (Session["filename"] != "")
                {
                    string filename = Session["filename"].ToString();



                    string path = Server.MapPath("~/screen/imgs/ths/") + filename;

                    string path1 = Server.MapPath("~/screen/imgs/ths/") + Convert.ToString(latestid.ToString());

                    if (File.Exists(path) == true)
                    {


                        File.Move(path, path1 + ".jpg");




                    }