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AI-generatedF# 5.0 async block default cancellation token behavior shift in .NET 5+
Goal: Migrate an F# codebase using async { } blocks to .NET 5+ while preserving existing cancellation semantics without introducing unexpected blocking or token propagation behavior. Constraint: F# 5.0 altered the default cancellation token handling for async blocks, changing how the runtime supplies or expects a token during execution. Code that previously
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