private bool IsDateField(Field field)
            {
                if (field == Field.Date)
                {
                    return(true);
                }

                if (field == Field.User1 || field == Field.User2 || field == Field.User3 || field == Field.User4 || field == Field.User5)
                {
                    UserFieldType uft = DataBase.GetUserFieldType(field);
                    if (uft == UserFieldType.Date)
                    {
                        return(true);
                    }
                }

                return(false);
            }
 public ComboBoxItem(UserFieldType userFieldType)
 {
     UserFieldType = userFieldType;
 }