The CLS specifies certain Custom Attributes and requires that conformant languages support them. These attributes are located under System.
| Attribute | Description |
|---|---|
AttributeUsageAttribute |
Used to specify how an attribute is intended to be used. |
ObsoleteAttribute |
Indicates that an element is not to be used. |
CLSCompliantAttribute |
Indicates whether or not an element is declared to be CLS compliant through an instance field on the attribute object. |