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to convert your 2 `Output&lt;string&gt;` into `Output&lt;string[]&gt;` it would be:
```var subnetIdArray = Output.Tuple(componentOne.PublicSubnet0, componentOne.PublicSubnet1).Apply((subnet0, subnet1) =&gt; {
    return new[] { subnet0.Id, subnet1.Id };
});```
And then you could do:
```return new Dictionary&lt;string, object?&gt;()
{
    ["subnets-public"] = subnetIdArray,
};```
But I've never personally tried to output an array, I've always kept it `string:string`. So not sure what `var subnets = stack.GetOutput("subnets-public")` will look like

To clarify this `new[] {componentOne.PublicSubnet0.Apply(x =&gt; x.Id), componentOne.PublicSubnet1.Apply(x =&gt; x.Id)}` is giving you `Output&lt;string&gt;[]` instead of `Output&lt;string[]&gt;` . So you need to use `.Tuple(...)` to merge your outputs.