# HttpKnownHeaderNames.Vary

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

## Vary {#Sisk_Core_Http_HttpKnownHeaderNames_Vary}

The HTTP Vary header.

Indicates that the response varies based on the value of the specified request headers, allowing for content negotiation.

```csharp
public const string Vary = "Vary"
```

### Field Value

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