How can I json in asmx without xml tag?

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string HelloWorld()
{
  return "Hello World";
}

public class LoginError
{
  public string login { get; set; }
   public string error_code { get; set; }
}
[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public string login(){
 LoginError l = new LoginError();
l.login = "fail";
l.error_code = "1";
return new JavaScriptSerializer().Serialize(l);
}

[WebMethod]
        [ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
        public string Tester()
        {
            JavaScriptSerializer ser = new JavaScriptSerializer();

            var jsonData = new
            {
                total = 1, // we'll implement later 
                page = 1,
                records = 3, // implement later 
                rows = new[]{
              new {id = 1, cell = new[] {"1", "-7", "Is this a good question?", "yay"}},
              new {id = 2, cell = new[] {"2", "15", "Is this a blatant ripoff?", "yay"}},
              new {id = 3, cell = new[] {"3", "23", "Why is the sky blue?", "yay"}}
            }
            };

            return ser.Serialize(jsonData); //products.ToString();
        }