Using array in C++ that came from managed code system::collections::generic::icollection

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managed

My managed code returns System::Collections::Generic::ICollection<string>.

I receive it in C++ by:

auto failArr = op->messages

I see that the type of failArr in C++ is array<system::string^>

How do I get to the members of failArr? How can I know its size?

What I have tried:

tried failArr[0], tried failArr.size, tried failArr->size