# DockerfileBaseImageAnnotation

- Kind: `class`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.3.0`
- Namespace: `Aspire.Hosting.ApplicationModel`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/DockerfileBaseImageAnnotation.cs)
- Implements: [IResourceAnnotation](/reference/api/csharp/aspire.hosting/iresourceannotation.md)

Represents an annotation for specifying custom base images in generated Dockerfiles.

## Definition

```csharp
namespace Aspire.Hosting.ApplicationModel;

public class DockerfileBaseImageAnnotation
    : Aspire.Hosting.ApplicationModel.IResourceAnnotation
{
    // ...
}
```

## Remarks

This annotation allows developers to override the default base images used when generating Dockerfiles for resources. It supports specifying separate build-time and runtime base images for multi-stage builds.

## Constructors

- [DockerfileBaseImageAnnotation](/reference/api/csharp/aspire.hosting/dockerfilebaseimageannotation/constructors.md#constructor)

## Properties

- [BuildImage](/reference/api/csharp/aspire.hosting/dockerfilebaseimageannotation/properties.md#buildimage) : `string?` `get; set` -- Gets or sets the base image to use for the build stage in multi-stage Dockerfiles.
- [RuntimeImage](/reference/api/csharp/aspire.hosting/dockerfilebaseimageannotation/properties.md#runtimeimage) : `string?` `get; set` -- Gets or sets the base image to use for the runtime stage in multi-stage Dockerfiles.