NotMapped Property for PetaPoco or Ignore Column while Insert/Update in Petapoco [NotMapped]   ==>  [ResultColumn] [NotMapped] equivalent of entity framework in Petapoco is [ResultColumn] For more information Example:  If you have contact form model where you want user to enter captcha, but you don't want this captcha to be store in db, so In order to ignore captcha column while inserting