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Fix lifecycle compatibility guidance (#93)

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* Fix lifecycle compatibility guidance

Correct high-confidence Business Central guidance and samples for upgrade tags, collectible errors, trigger semantics, obsoletion, events, interfaces, API contracts, and test transactions.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: e05a43e7-6448-4d67-9c73-798523f5d945

* Address guidance review findings

Gate SecretText guidance to BC23 and clarify that the collectible-error sample intentionally emits a message-only blocking aggregate.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: e05a43e7-6448-4d67-9c73-798523f5d945

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
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Jesper Schulz-Wedde 2026-07-14 11:26:16 +02:00 • committed by GitHub
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microsoft/knowledge/interfaces/set-defaultimplementation-on-enum.md
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@ -15,7 +15,7 @@ An `enum` that `implements` an interface maps each value to a codeunit through t
## Best Practice
On any extensible enum that implements an interface, set `DefaultImplementation = <Interface> = <Codeunit>;` at the enum level, pointing at a safe implementation that does nothing harmful. Values with their own `Implementation` keep using it; every other value — including ones added later by extensions — resolves to the default instead of failing. For the distinct case of an out-of-range integer that matches no declared value, pair it with `UnknownValueImplementation`. The result is that a consumer can assign any enum value to the interface variable and call through it without a runtime guard.
On any extensible enum that implements an interface, set `DefaultImplementation = <Interface> = <Codeunit>;` at the enum level, pointing at a safe implementation that does nothing harmful. Values with their own `Implementation` keep using it; declared values without one resolve to the default. For an ordinal that matches no currently declared value — for example persisted data left after an enum extension is uninstalled — runtime 7.0 and later can use `UnknownValueImplementation` as a distinct fallback. Do not recommend that property to apps targeting an earlier runtime.
See sample: `set-defaultimplementation-on-enum.good.al`.