Frozen collections in .NET 8

• .NET Runtime

  231 11,087 10.0 C#

  .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.

  

  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.

• ASP.NET Core

  653 30,772 9.9 C#

  ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.

  

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

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