# HttpKnownHeaderNames.SecWebSocketExtensions

Kind: Field  
Namespace: `Sisk.Core.Http`  
Assembly: `Sisk.Core.dll`  
Source: https://docs.sisk-framework.org/api/Sisk.Core.Http.HttpKnownHeaderNames.SecWebSocketExtensions.html

## SecWebSocketExtensions {#Sisk_Core_Http_HttpKnownHeaderNames_SecWebSocketExtensions}

The HTTP Sec-WebSocket-Extensions header.

Used to negotiate WebSocket extensions during the handshake, allowing for additional features and capabilities.

```csharp
public const string SecWebSocketExtensions = "Sec-WebSocket-Extensions"
```

### Field Value

[string](https://learn.microsoft.com/dotnet/api/system.string)