Currently, MultiSelectModel does not work as documented:
Player: Your app is activated one time. All of the selected files are passed to your app as argument parameters.
As far as Anniversary Update and Creators Update are concerned, MultiSelectModel has no effect and only one file is passed as argument to the application regardless of how many files have been selected in Explorer.
Please support the passing of all selected files as command arguments.1 vote
Thanks for the bug. We’ve logged it and looking into it.
When I know more, i’ll follow up.
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