C#反射DeBugInfo

using System;
using System.Reflection;

namespace BugFixApplication {
   //a custom attribute BugFix to be
   //assigned to a class and its members
   [AttributeUsage(AttributeTargets.Class |
   AttributeTargets.Constructor |
   AttributeTargets.Field |
   AttributeTargets.Method |
   AttributeTargets.Property,
   AllowMultiple = true)]

   public class DeBugInfo : System.Attribute {
      private int bugNo;
      private string developer;
      private string lastReview;
      public string message;

      public DeBugInfo(int bg, string dev, string d) {
         this.bugNo = bg;
         this.developer = dev;
         this.lastReview = d;
      }

      public int BugNo {
         get {
            return bugNo;
         }
      }

      public string Developer {
         get {
            return developer;
         }
      }

      public string LastReview {
         get {
            return lastReview;
         }
      }

      public string Message {
         get {
            return message;
         }
         set {
            message = value;
         }
      }
   }
   [DeBugInfo(45, Zara Ali, 12/8/2012, Message = Return type mismatch)]
   [DeBugInfo(49, Nuha Ali, 10/10/2012, Message = Unused variable)]

   class Rectangle {
      //member variables
      protected double length;
      protected double width;
      public Rectangle(double l, double w) {
         length = l;
         width = w;
      }

      [DeBugInfo(55, Zara Ali, 19/10/2012, Message = Return type mismatch)]
      public double GetArea() {
         return length * width;
      }

      [DeBugInfo(56, Zara Ali, 19/10/2012)]
      public void display() {
         Console.WriteLine(Length: {0}, length);
         Console.WriteLine(Width: {0}, width);
         Console.WriteLine(Area: {0}, GetArea());
      }
   }//end class Rectangle

   class ExecuteRectangle {
      static void Main(string[] args) {
         Rectangle r = new Rectangle(4.5, 7.5);
         r.display();
         Type type = typeof(Rectangle);

         //iterating through the attribtues of the Rectangle class
         foreach (Object attributes in type.GetCustomAttributes(false)) {
            DeBugInfo dbi = (DeBugInfo)attributes;

            if (null != dbi) {
               Console.WriteLine(Bug no: {0}, dbi.BugNo);
               Console.WriteLine(Developer: {0}, dbi.Developer);
               Console.WriteLine(Last Reviewed: {0}, dbi.LastReview);
               Console.WriteLine(Remarks: {0}, dbi.Message);
            }
         }

         //iterating through the method attribtues
         foreach (MethodInfo m in type.getmethods()) {

            foreach (Attribute a in m.GetCustomAttributes(true)) {
               DeBugInfo dbi = (DeBugInfo)a;

               if (null != dbi) {
                  Console.WriteLine(Bug no: {0}, for Method: {1}, dbi.BugNo, m.Name);
                  Console.WriteLine(Developer: {0}, dbi.Developer);
                  Console.WriteLine(Last Reviewed: {0}, dbi.LastReview);
                  Console.WriteLine(Remarks: {0}, dbi.Message);
               }
            }
         }
         Console.ReadLine();
      }
   }
}