Move projection SumAsync to System.Interactive.Async#2289
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… System.Interactive.Async Also introduced a INCLUDE_RELOCATED_TO_INTERACTIVE_ASYNC constant that is set during reference assembly build. This behaves identically to INCLUDE_SYSTEM_LINQ_ASYNCENUMERABLE_DUPLICATES, but enables the source code to distinguish between methods hidden because they are now in System.Linq.AsyncEumerable, and methods hidden because we moved them to System.Interactive.Async
mwadams
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Also introduced a INCLUDE_RELOCATED_TO_INTERACTIVE_ASYNC constant that is set during reference assembly build. This behaves identically to INCLUDE_SYSTEM_LINQ_ASYNCENUMERABLE_DUPLICATES, but enables the source code to distinguish between methods hidden because they are now in System.Linq.AsyncEumerable, and methods hidden because we moved them to System.Interactive.Async
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We missed this earlier. Similar to
AverageAsync, the set ofSumAsyncoverloads available in .NET 10's newSystem.Linq.AsyncEnumerablepackage is a subset of the overloads previously available inSystem.Linq.Async. Ix.NET always offered various projection-based overloads, but the newSystem.Linq.AsyncEnumerablepackage does not.The general pattern is that whereas
System.Linq.Asyncwas intended for core 'standard' LINQ features, we put Ix-specific operators inSystem.Interactive.Async. SinceSystem.Linq.AsyncEnumerabledoesn't provide these overloads, that pretty much means they aren't standard operators.We are aiming to deprecated Ix's
System.Linq.Async, so we can't just leave these overloads in there. So instead, we move them intoSystem.Interactive.Async. (They remain inSystem.Linq.Asyncin 'hidden' form, only present in the runtime assemblies to provide backwards compatibility.)We think this is the last of the work required to deal with potential conflicts between
System.Interactive.AsyncandSystem.Linq.AsyncEnumerable, so this closes #2279