public DataSet GetUsernameforchangepassword(LoginSchema r_objLoginSchema) { try { objLoginDAL = new LoginDAL(); res_user = objLoginDAL.CheckUsernameforchangepassword(r_objLoginSchema); return(res_user); } catch (Exception e) { return(null); } finally { objLoginDAL = null; r_objLoginSchema = null; ds = null; res_user = null; } }