Cleanup: Delete Pair of TKey, TValue #9265
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rainersigwald
approved these changes
Sep 25, 2023
YuliiaKovalova
approved these changes
Sep 25, 2023
This was referenced Jul 29, 2025
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Context
The sole purpose of introducing the type seems to have been silencing a legacy code analyzer rule. The rule does not exist anymore / has not been brought over to Roslyn (dotnet/roslyn-analyzers#722) and it's now hurting performance, if anything. We seem to be using primarily instantiations where both
TKeyandTValueare reference types, which will pick up the__Canon, __Canoninstantiation from the mscorlib native image. The rest is handled by IBC/OptProf.Changes Made
Deleted Pair<TKey, TValue> and its uses.
Testing
Experimental insertion to confirm no regressions.