Thanks @Youssef1313. Please hold off on this for now until we confirm with C# Language Design that we want to warn for differences in parameter names.

@Youssef1313, confirmed, we should warn for differences in parameter names or type parameter names.

We should use the same warning used for type differences, WRN_PartialMethodTypeDifference, updated to mention names in addition to types.

Perhaps the text of the combined warning should say:
"Partial method declarations '{0}' and '{1}' should have identical return types, parameter types, parameter names, and type parameter names."

Please feel free to proceed after warning WRN_PartialMethodTypeDifference has been added to the 16.9 warning wave.

@cston Thanks for confirming this.

I'll wait until WRN_PartialMethodTypeDifference is added again, then update its message and add tests.

In the meanwhile, I'll mark as a draft until WRN_PartialMethodTypeDifference is added again.

@cston Any updates on this?

Please feel free to proceed after warning WRN_PartialMethodTypeDifference has been added to the 16.9 warning wave.

Looks like this had slipped from 16.9?
#47879 (comment) should have been re-reverted.

Replaced by #53352