# HttpHeaderCollection.ETag

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

## ETag {#Sisk_Core_Entity_HttpHeaderCollection_ETag}

Gets or sets the value of the HTTP ETag header.

Provides a unique identifier for a specific version of a resource, allowing clients to cache and validate resources efficiently.

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

### Property Value

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