Could not find a copier for type <>z__ReadOnlyArray`1[IFoo]. about orleans

[ReubenBond]

Thanks for reporting, @Jens-G! This should work if the parameter type of AddFoo is a concrete type, like List<T>. What is the signature of AddFoo in your example? Either way, I agree that we should implement support for this in-box

[Jens-G]

Yes, this works around the issue:

var tmp = new List<IFoo>() { this };
await bar.AddFoo(tmp);

The signature I use is this

Task AddFoo(IEnumerable<IFoo> list);

[cptjazz]

Also see #8934 and #8964