????4????????????

    public class Program 
    { 
        static void Main(string[] args) 
        { 
           /* I discussed with Jim from Sales over coffee  
            * at the Starbucks on main street one day and he 
            * told me that Sales Reps receive commission  
            * based upon the following structure.  
            * Friday: 25% 
            * Wednesday: 15% 
            * All Other Days: 5% 
            * Did I mention that I ordered the Caramel Latte with 
            * a double shot of Espresso?  
           */
            double price = 5.00; 
            double commissionRate; 
            double commission; 
            if (DateTime.Today.DayOfWeek == DayOfWeek.Friday) 
            { 
                commissionRate = .25; 
            } 
            else if (DateTime.Today.DayOfWeek == DayOfWeek.Wednesday) 
            { 
                commissionRate = .15; 
            } 
            else
            { 
                commissionRate = .05; 
            } 
            commission = price * commissionRate; 
        } 
    }

?????????????????????Щ?????????????????????Jim from Sales??????????????Jim?????????????????Щ??????????????????????????????????????????????Щ???????????顣

????5??“????”??????

    public class Program 
    { 
        static void Main(string[] args) 
        { 
           //TODO: I need to fix this someday – 07/24/1995 Bob 
           /* I know this error message is hard coded and 
            * I am relying on a Contains function but  
            * someday I will make this code print a  
            * meaningful error message and exit gracefully. 
            * I just don’t have the time right now. 
           */
           string message = "An error has occurred"; 
           if(message.Contains("error")) 
           { 
               throw new Exception(message); 
           } 
        } 
    }

?????????????????????????漸???????????TODO???????????????????????С???????????????????????????——???????鷳????????????????????????????????????????

???????????????????Щ?????????????????????????÷???????????????????Steve McConnellд??Code Complete????????????????