# ContainerRuntimeArgsCallbackAnnotation Constructors

- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Type: [ContainerRuntimeArgsCallbackAnnotation](/reference/api/csharp/aspire.hosting/containerruntimeargscallbackannotation.md)
- Kind: `Constructors`
- Members: `2`

Represents an additional argument to pass to the container runtime run command.

## ContainerRuntimeArgsCallbackAnnotation(Func<ContainerRuntimeArgsCallbackContext, Task>)

- Name: `Constructor(Func<ContainerRuntimeArgsCallbackContext, Task>)`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/ContainerRuntimeArgsCallbackAnnotation.cs)

Initializes a new instance of the [ContainerRuntimeArgsCallbackAnnotation](/reference/api/csharp/aspire.hosting/containerruntimeargscallbackannotation.md) class with the specified callback action.

```csharp
public sealed class ContainerRuntimeArgsCallbackAnnotation
{
    public ContainerRuntimeArgsCallbackAnnotation(
        Func<ContainerRuntimeArgsCallbackContext, Task> callback)
    {
        // ...
    }
}
```

## Parameters

- `callback` (`Func<ContainerRuntimeArgsCallbackContext, Task>`)

## ContainerRuntimeArgsCallbackAnnotation(Action<IList<object>>)

- Name: `Constructor(Action<IList<object>>)`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/ContainerRuntimeArgsCallbackAnnotation.cs)

Initializes a new instance of the [ContainerRuntimeArgsCallbackAnnotation](/reference/api/csharp/aspire.hosting/containerruntimeargscallbackannotation.md) class with the specified callback action.

```csharp
public sealed class ContainerRuntimeArgsCallbackAnnotation
{
    public ContainerRuntimeArgsCallbackAnnotation(
        Action<IList<object>> callback)
    {
        // ...
    }
}
```

## Parameters

- `callback` (`Action<IList<object>>`)
  The callback action to be executed.