Add 'CsWinRTEnableManifestFreeActivation' feature switch #1887
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This PR adds the new "CsWinRTEnableManifestFreeActivation" feature switch (enabled by default), which allows disabling the manifest-free fallback path for WinRT activation. When disabled, all fallback code will be removed, and trying to activate a type that is not registered will throw
NotSupportedException
. This can be useful to:Ideally, packaged apps should strive to be able to run with this feature switch disabled, for best performance.