C# Language Specification

Interfaces

interface-declaration:
attributes_opt interface-modifiers_opt partial_opt interface
identifier variant-type-parameter-list_opt interface-base_opt
type-parameter-constraints-clauses_opt interface-body ;_opt

interface-modifiers:
interface-modifier
interface-modifiers interface-modifier

interface-modifier:
new
public
protected
internal
private

variant-type-parameter-list:
< variant-type-parameters >

variant-type-parameters:
attributes_opt variance-annotation_opt type-parameter
variant-type-parameters , attributes_opt variance-annotation_opt type-parameter

variance-annotation:
in
out

interface-base:
: interface-type-list

interface-body:
{ interface-member-declarations_opt }

interface-member-declarations:
interface-member-declaration
interface-member-declarations interface-member-declaration

interface-member-declaration:
interface-method-declaration
interface-property-declaration
interface-event-declaration
interface-indexer-declaration

interface-method-declaration:
attributes_opt new_opt return-type identifier type-parameter-list
( formal-parameter-list_opt ) type-parameter-constraints-clauses_opt ;

interface-property-declaration:
attributes_opt new_opt type identifier { interface-accessors }

interface-accessors:
attributes_opt get ;
attributes_opt set ;
attributes_opt get ; attributes_opt set ;
attributes_opt set ; attributes_opt get ;

interface-event-declaration:
attributes_opt new_opt event type identifier ;

interface-indexer-declaration:
attributes_opt new_opt type this [ formal-parameter-list ] { interface-accessors }

51. Enums

enum-declaration:
attributes_opt enum-modifiers_opt enum identifier enum-base_opt enum-body ;_opt

enum-base:
: integral-type

enum-body:
{ enum-member-declarations_opt }
{ enum-member-declarations , }

enum-modifiers:
enum-modifier
enum-modifiers enum-modifier

enum-modifier:
new
public
protected
internal
private

enum-member-declarations:
enum-member-declaration
enum-member-declarations , enum-member-declaration

enum-member-declaration:
attributes_opt identifier
attributes_opt identifier = constant-expression

52.