Frozen collections in .NET 8

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  • You should read the proposal thread as it discusses this to some extent https://github.com/dotnet/runtime/issues/67209. Immutable does not simply mean read-only but it means that we can mutate the underlying data structure, yet each mutation spawns a logically independent object for the programmer. The Immutable library is optimized for this purpose just as a truly functional language must optimize for this. The new frozen libs are optimized for read only access.

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  • It's so niche it's probably only getting merged because asp.net core team found it useful.

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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