Is there a way to set outputs like the following?

using System.Collections.Generic;
using Pulumi;
using Pulumi.Aws.S3;

return await Deployment.RunAsync(async () =>
{
    var outputs = new Dictionary<string, object?>();

    var bucket = new Bucket("items", new BucketArgs { });

    bucket.Arn.Apply(arn =>
    {
        outputs.Add("arn", arn); //here
        return arn;
    });

    return outputs;
});

This won’t always work as Arn.Apply won’t resolve until the resource is deployed, so your outputs will be empty on the initial run