A class that derives from the abstract class System.Attribute, whether directly or indirectly, is an attribute class. The declaration of an attribute class defines a new kind of attribute that can be placed on a declaration. By convention, attribute classes are named with a suffix of Attribute. Uses of an attribute may either include or omit this suffix.

In This Section:

• 24.1.1: Attribute usage
• 24.1.2: Positional and named parameters
• 24.1.3: Attribute parameter types