Exception handle with finally

   

/*
Learning C# 
by Jesse Liberty

Publisher: O'Reilly 
ISBN: 0596003765
*/

 using System;

 namespace ExceptionHandling
 {
    public class TesterExceptionHandling6
    {
       public void Run()
       {
           try
           {
               Console.WriteLine("Open file here");
               double a = 12;
               double b = 0;
               Console.WriteLine ("{0} / {1} = {2}",
                   a, b, DoDivide(a,b));
               Console.WriteLine (
                   "This line may or may not print");
           }

               // most derived exception type first
           catch (System.DivideByZeroException e)
           {
               Console.WriteLine(
                   "
DivideByZeroException! Msg: {0}",
                   e.Message);
               Console.WriteLine(
                   "
HelpLink: {0}", e.HelpLink);
               Console.WriteLine(
                   "
Here's a stack trace: {0}
",
                   e.StackTrace);
           }
           catch
           {
               Console.WriteLine(
                   "Unknown exception caught");
           }
           finally
           {
               Console.WriteLine (
                   "Close file here.");
           }

       }

        // do the division if legal
        public double DoDivide(double a, double b)
        {
            if (b == 0)
            {
                DivideByZeroException e =
                    new DivideByZeroException();
                e.HelpLink =
                    "http://www.libertyassociates.com";
                throw e;
            }
            if (a == 0)
                throw new ArithmeticException();
            return a/b;
        }

        static void Main()
        {
            Console.WriteLine("Enter Main...");
            TesterExceptionHandling6 t = new TesterExceptionHandling6();
            t.Run();
            Console.WriteLine("Exit Main...");
        }
    }
 }