| Class | Description | |
|---|---|---|
 | Signatures | Represents all identifiers of built-in types. |
| Class | Description | |
|---|---|---|
| Signatures | Represents all identifiers of built-in types. |
| Interface | Description | |
|---|---|---|
 | IExtensibleObject<T> | Enable an object to participate in custom behavior, such as registering for events, or watching state transitions. |
| IExtension<T> | Enables an object to extend another object through aggregation. |
| IExtensionCollection<T> | A collection of the IExtension<T> objects that allow for retrieving the IExtension<T> by its type. |