How to check extension of file using Platform::String?

I'm trying to check whether StorageFile is a zip file. I can convert the StorageFile to it's full name including it's extension.

However there are very little helpful methods within Platform::String that I can use to check file extension.

Given the name, I'd expect Path.GetExtension to work for you, if you're using the .NET "view" of WinRT. (I don't know if there's a direct equivalent in WinRT itself. Looking now.)

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