# RegistryTargetAnnotation Constructors

- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Type: [RegistryTargetAnnotation](/reference/api/csharp/aspire.hosting/registrytargetannotation.md)
- Kind: `Constructors`
- Members: `1`

Annotation that indicates a resource should use a specific container registry as its default target.

## RegistryTargetAnnotation(IContainerRegistry)

- Name: `Constructor(IContainerRegistry)`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/RegistryTargetAnnotation.cs#L17-L22)

Annotation that indicates a resource should use a specific container registry as its default target.

```csharp
public sealed class RegistryTargetAnnotation
{
    public RegistryTargetAnnotation(
        IContainerRegistry registry)
    {
        // ...
    }
}
```

## Parameters

- `registry` ([IContainerRegistry](/reference/api/csharp/aspire.hosting/icontainerregistry.md))
  The container registry resource.

## Remarks

This annotation is automatically added to resources when a container registry is added to the application model. It provides a default registry for resources that don't have an explicit [ContainerRegistryReferenceAnnotation](/reference/api/csharp/aspire.hosting/containerregistryreferenceannotation.md).