Optional<string> doesn't work with query params?

In the Swagger docs I have:

Optional<T> doesn't work with query parameters
- You can't have the following:
```
[HttpGet]
public string Get([FromQuery] Optional<string> foo)
{
return foo;
}
```
- This is because of the following issue: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/2226

However I think this doesn't just break Swagger as when I try to hit this endpoint, I get this error:

InvalidOperationException: Could not create an instance of type 'Harvzor.Optional.Optional`1[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]'. Model bound complex types must not be abstract or value types and must have a parameterless constructor. Record types must have a single primary constructor. Alternatively, give the 'foo' parameter a non-null default value.

harvzor / harvzor-optional

Optional<string> doesn't work with query params? #8