# DockerfileBuilderCallbackContext Properties

- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Type: [DockerfileBuilderCallbackContext](/reference/api/csharp/aspire.hosting/dockerfilebuildercallbackcontext.md)
- Kind: `Properties`
- Members: `4`

Provides context information for Dockerfile build callbacks.

## Builder

- Name: `Builder`
- Modifiers: `get`
- Returns: [DockerfileBuilder](/reference/api/csharp/aspire.hosting/dockerfilebuilder.md)
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/DockerfileBuilderCallbackContext.cs#L39)

Gets the Dockerfile builder instance.

```csharp
public DockerfileBuilder Builder { get; }
```

## CancellationToken

- Name: `CancellationToken`
- Modifiers: `get`
- Returns: `CancellationToken`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/DockerfileBuilderCallbackContext.cs#L49)

Gets the cancellation token to observe while waiting for the task to complete.

```csharp
public CancellationToken CancellationToken { get; }
```

## Resource

- Name: `Resource`
- Modifiers: `get`
- Returns: [IResource](/reference/api/csharp/aspire.hosting/iresource.md)
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/DockerfileBuilderCallbackContext.cs#L34)

Gets the resource being built.

```csharp
public IResource Resource { get; }
```

## Services

- Name: `Services`
- Modifiers: `get`
- Returns: `IServiceProvider`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/DockerfileBuilderCallbackContext.cs#L44)

Gets the service provider for dependency injection.

```csharp
public IServiceProvider Services { get; }
```