Fix crash in ClientProvider.BuildMethods when children list contains duplicates#10355

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copilot/fix-azure-client-operation-group-crash

Commits on Apr 13, 2026

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fix: deduplicate sub-clients in GetSubClients to prevent ToDictionary crash with duplicate children

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jorgerangel-msft
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refactor: use HashSet for O(1) dedup lookup in GetSubClients

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jorgerangel-msft
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fix: deduplicate children in emitter client-converter instead of generator

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jorgerangel-msft
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refactor: use loop with Set for dedup and add TODO for upstream fix

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jorgerangel-msft
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test: add additional nested interface to TestClientNs in dedup test

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jorgerangel-msft
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