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Note

For security reasons, it is considered a .NET best practice to design all custom attributes as sealed. In

fact, Visual Studio 2008 provides a code snippet named 

Attribute

that will dump out a new 

System.

Attribute

-derived class into your code window. See Chapter 2 for an explication of using code snippets.

Applying Custom Attributes

Given that VehicleDescriptionAttribute is derived from System.Attribute, you are now able to

annotate your vehicles as you see fit. For testing purposes, add the following class definitions to

your new class library: