C# 0 The Complete Reference

PART I

C h a p t e r   1 3 :  

E x c e p t i o n   H a n d l i n g  

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PART IPART I

      Rethrow.GenException();

    }

    catch(IndexOutOfRangeException) {

      // recatch exception

     Console.WriteLine("Fatal error -- " + "program terminated.");

    }

  }

}

In this program, divide-by-zero errors are handled locally, by 

GenException( )

, but an array 

boundary error is rethrown. In this case, the 

IndexOutOfRangeException

 is handled by 

Main( )

.

Using finally

Sometimes you will want to define a block of code that will execute when a 

try/catch

 block 

is left. For example, an exception might cause an error that terminates the current method, 

causing its premature return. However, that method may have opened a file or a network 

connection that needs to be closed. Such types of circumstances are common in programming,

and C# provides a convenient way to handle them: 

finally

.

To specify a block of code to execute when a 

try/catch

 block is exited, include a