# IHttpEngineHeaderList.DefinedHeaderNames

Kind: Property  
Namespace: `Sisk.Core.Http.Engine`  
Assembly: `Sisk.Core.dll`  
Source: https://docs.sisk-framework.org/api/Sisk.Core.Http.Engine.IHttpEngineHeaderList.DefinedHeaderNames.html

## DefinedHeaderNames {#Sisk_Core_Http_Engine_IHttpEngineHeaderList_DefinedHeaderNames}

Gets an array of strings representing the names of all defined headers in the collection.

```csharp
string[] DefinedHeaderNames { get; }
```

### Property Value

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