| HttpEventSourceCollection | Provides a managed object to manage HttpRequestEventSource connections. |
| HttpRequestEventSource | An HttpRequestEventSource instance opens a persistent connection to the request, which sends events in text/event-stream format. |
| HttpResponseStreamManager | Represents a way to manage HTTP requests with their output streams, without relying on synchronous content. |
| HttpStreamPingPolicy | Provides an automatic ping sender for HTTP Event Source connections. |
| HttpWebSocket | Provides an persistent bi-directional socket between the client and the HTTP server. |
| HttpWebSocketConnectionCollection | Provides a managed object to manage HttpWebSocket connections. |
| WebSocketMessage | Represents an websocket request message received by an websocket server. |