public void Update(string property, TargetOption option, string valueList)
        {
            Guard.IsNotNullOrEmpty(property, "Invalid property");
            Guard.IsNotNullOrEmpty(valueList, "Invalid userList");

            Option     = option;
            Property   = property;
            ValuesList = ValuesList.NewList(valueList);
        }
        public static TargetSpecificUsers New(UserTargeting userTargeting, string property, TargetOption option, string valueList)
        {
            Guard.IsNotNullOrEmpty(property, "Invalid property");
            Guard.IsNotNullOrEmpty(valueList, "Invalid userList");

            return(new TargetSpecificUsers
            {
                Option = option,
                Property = property.ToLower(),
                UserTargetingId = userTargeting.Id,
                UserTargeting = userTargeting,
                ValuesList = ValuesList.NewList(valueList)
            });
        }