Get Acivity type Code plugin code mscrm 2011

       private bool GetActivityType(IOrganizationService service, Guid mentionId,int entityTypecode )

        {

            Boolean flag = false;

            switch (entityTypecode)

            {

                case 4201:

                    flag=GetActivityRecordType(service, mentionId, "appointment");

                    break;

                case 4202:

                   flag= GetActivityRecordType(service, mentionId, "email");

                    break;

                case 4204:

                   flag= GetActivityRecordType(service, mentionId, "fax");

                    break;

                case 4207:

                    flag= GetActivityRecordType(service, mentionId, "letter");

                    break;

                case 4210:

                    flag = GetActivityRecordType(service, mentionId, "phonecall");

                    break;

                case 4212:

                   flag= GetActivityRecordType(service, mentionId, "task");

                    break;

                case 4251:

                    flag = GetActivityRecordType(service, mentionId, "recurringappointmentmaster");

                    break;

                case 4214:

                    flag = GetActivityRecordType(service, mentionId, "serviceappointment");

                    break;

                default: break;

            }

         return flag;

        }

    }

}