# HttpKnownHeaderNames.IfNoneMatch

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

## IfNoneMatch {#Sisk_Core_Http_HttpKnownHeaderNames_IfNoneMatch}

The HTTP If-None-Match header.

Used to make a conditional request, allowing the client to specify that the resource should only be returned if it does not match the given ETag.

```csharp
public const string IfNoneMatch = "If-None-Match"
```

### Field Value

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