# HttpHeaderCollection.ProxyAuthenticate

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

## ProxyAuthenticate {#Sisk_Core_Entity_HttpHeaderCollection_ProxyAuthenticate}

Gets or sets the value of the HTTP Proxy-Authenticate header.

Used by a proxy server to request authentication from the client, indicating the authentication method required.

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

### Property Value

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