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The Simplest Possible Example

To illustrate the usefulness of structured exception handling, we need to create a type that may

throw an exception under the correct circumstances. Assume we have created a new C# Console

Application project (named SimpleException) that defines two class types (Car and Radio) associ-

ated by the “has-a” relationship. The Radio type defines a single method that turns the radio’s power

on or off:

class Radio

{

public void TurnOn(bool on)

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{

if(on)

Console.WriteLine("Jamming...");

else

Console.WriteLine("Quiet time...");

}

}

In addition to leveraging the Radio type via containment/delegation, the Car type is defined in

such a way that if the user accelerates a Car object beyond a predefined maximum speed (specified

using a constant member variable named MaxSpeed), its engine explodes, rendering the Car unus-

able (captured by a bool member variable named carIsDead).

Beyond these points, the Car type has a few member variables to represent the current speed

and a user supplied “pet name” as well as various constructors to set the state of a new Car object.

Here is the complete definition (with code annotations):

class Car

{