No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

Pulumi Community

Hi,

I am looking to convert InputList&lt;T&gt; to InputList&lt;Union&lt;string, T&gt;&gt;. I have written the following code to do it but at least in my mind this conversion should be automatic under some operator. I understand that T for Input&lt;T&gt; / Output&lt;T&gt; is opaque but I want to make sure I am not missing something

```InputList&lt;Union&lt;string, FrontDoorProtocol&gt;&gt; protocols = new InputList&lt;Union&lt;string, FrontDoorProtocol&gt;&gt;();
await foreach (var protocol in acceptedProtocols)
{
	protocols.Add(protocol);
}
return protocols;```


i think you can do it with Apply instead of async/await - something like
```InputList&lt;string&gt; acceptedProtocols = ...

InputList&lt;Union&lt;string, FrontDoorProtocol&gt;&gt; protocols = acceptedProtocols.Apply(list =&gt;
   list.Select(x =&gt; buildUnion(x, ...));```

Thank you <@U01QFM8E9A9> I think this will work. I completely missed the fact that  has a `Union.From()` factory method

```AcceptedProtocols = rule.AcceptedProtocols.Apply(protocolArray =&gt; protocolArray.Select(Union&lt;string, FrontDoorProtocol&gt;.FromT1))```
Just for completeness in case someone else looks that thread.