// This example demonstrates the Exception.Data property. 

using System;

using System.Collections;

​

public class Sample 

{

   public static void Main()

   {

      Console.WriteLine("\nException with some extra information...");

      RunTest(false);

      Console.WriteLine("\nException with all extra information...");

      RunTest(true);

   }

​

   public static void RunTest(bool displayDetails)

   {

      try {

         NestedRoutine1(displayDetails);

      }

      catch (Exception e) {

         Console.WriteLine("An exception was thrown.");

         Console.WriteLine(e.Message);

         if (e.Data.Count > 0) {

            Console.WriteLine("  Extra details:");

            foreach (DictionaryEntry de in e.Data)

               Console.WriteLine("    Key: {0,-20}      Value: {1}", 

                                 "'" + de.Key.ToString() + "'", de.Value);

         }

      }

   }

​

   public static void NestedRoutine1(bool displayDetails)

   {

      try {

         NestedRoutine2(displayDetails);

      }

      catch (Exception e) {

         e.Data["ExtraInfo"] = "Information from NestedRoutine1.";

         e.Data.Add("MoreExtraInfo", "More information from NestedRoutine1.");

         throw e;

      }

   }

​

   public static void NestedRoutine2(bool displayDetails)

   {

      Exception e = new Exception("This statement is the original exception message.");

      if (displayDetails) {

         string s = "Information from NestedRoutine2.";

         int i = -903;

         DateTime dt = DateTime.Now;

         e.Data.Add("stringInfo", s);

         e.Data["IntInfo"] = i;

         e.Data["DateTimeInfo"] = dt;

      }

      throw e;

   }

}