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Hm, I think maybe I found something by looking around in Object Browser a bit.

Looks like I could do:
```resourceA.SomeInput = Output.Format($"{resourceB.FirstOutput}...{resourceB.SecondOutput}");```
Because the string interpolation will be cast automatically by the compiler to a `System.FormattableString` .
Very elegant! :thumbsup:

That’s right. See this section of the docs for more details: <https://www.pulumi.com/docs/intro/concepts/programming-model/#outputs-and-strings|https://www.pulumi.com/docs/intro/concepts/programming-model/#outputs-and-strings>