[release/6.0] Add support for variance to IDIC #58670
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jeffschwMSFT
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elinor-fung
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Backport of #58646 to release/6.0
/cc @AaronRobinsonMSFT
Customer Impact
This enables support for variance in an
IDynamicInterfaceCastablescenario. The primary user of this, at present, is C#/WinRT. Without this there can be significant performance impact implementing variance in WinRT collections.Risk
Minimal