# HttpHeaderCollection.Vary

Kind: Property  
Namespace: `Sisk.Core.Entity`  
Assembly: `Sisk.Core.dll`  
Source: https://docs.sisk-framework.org/api/Sisk.Core.Entity.HttpHeaderCollection.Vary.html

## Vary {#Sisk_Core_Entity_HttpHeaderCollection_Vary}

Gets or sets the value of the HTTP Vary header.

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

```csharp
public string? Vary { get; set; }
```

### Property Value

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