Attributes

Input and Output Classes - slide 36 : 40

Attributes

Attributes offer a mechanism that allows the programmer to extend the programming language in simple ways.

Attributes can be accessed by the compiler and - at run-time - by the interpreter

An obsolete class C, and a class D with an obsolete method M.

Compiling class C, D, and E.

The attribute Obsolete is defined by a predefined class ObsoleteAttribute
- A subclass of System.Attribute
- Positional attribute parameters correspond to constructor parameters
- Named attribute parameters specify assignment to properties

A reproduction of class ObsoleteAttribute.

Sample usage of the reproduced class - causes a compilation error.